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Theben CHEOPS control KNX Manual

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Continuous valve actuator CHEOPS control
theben
As of: Jul-11 (Subject to change without notice) Page 1 of 71
Continuous valve actuator
CHEOPS control
incl. temperature control
CHEOPS control 732 9 201
Continuous valve actuator CHEOPS control
theben
As of: Jul-11 (Subject to change without notice) Page 2 of 71
Contents
1 Functional characteristics ................................................................................................... 4
1.1 Operation .................................................................................................................... 5
1.2 Benefits of Cheops Control ........................................................................................ 6
1.2.1 Special features ...................................................................................................... 6
1.3 Hardware versions ...................................................................................................... 7
1.4 Differences ................................................................................................................. 8
2 Technical data .................................................................................................................... 9
2.1 General ....................................................................................................................... 9
3 The "CHEOPS control V1.2" Application Program ....................................................... 10
3.1 Selection in the product database ............................................................................. 10
3.2 Parameter pages ........................................................................................................ 10
3.3 Communication objects ............................................................................................ 11
3.3.1 Object characteristics ........................................................................................... 11
3.3.2 Object description ................................................................................................ 12
3.4 Parameters ................................................................................................................ 17
3.4.1 Settings ................................................................................................................. 17
3.4.2 Set point values .................................................................................................... 19
3.4.3 Actual value .......................................................................................................... 22
3.4.4 Heating control ..................................................................................................... 24
3.4.5 Cooling control ..................................................................................................... 26
3.4.6 Additional heating step ......................................................................................... 28
3.4.7 Operation .............................................................................................................. 30
3.4.8 Operating mode .................................................................................................... 32
3.4.9 Device settings ..................................................................................................... 34
3.4.10 External interface ............................................................................................. 38
3.4.11 Linear characteristic valve curve ...................................................................... 39
3.4.12 Own characteristic valve curve ........................................................................ 40
4 Start-up ............................................................................................................................. 42
4.1 Installation ................................................................................................................ 42
4.2 Calibration strategies ................................................................................................ 43
4.2.1 Strategy 1, standard .............................................................................................. 43
4.2.2 Strategy 2, Automatic (only for devices from software version 63/ 61 drive) ..... 43
4.2.3 Strategy 3, with defined valve stroke. (Only for devices from software version
63) 44
4.2.4 LED display during calibration run ...................................................................... 45
4.3 Site function ............................................................................................................. 46
5 Appendix .......................................................................................................................... 47
5.1 Determining the current set point value ................................................................... 47
5.1.1 New operating modes ........................................................................................... 47
5.1.2 Old operating modes ............................................................................................ 48
5.1.3 Set point value calculations .................................................................................. 49
5.2 Set point value offset ................................................................................................ 50
5.2.1 Incremental set point temperature adjustment via keys ....................................... 51
5.2.2 Incremental set point temperature adjustment via Object 6 ................................. 51
5.2.3 Direct set point temperature adjustment via Object 1 .......................................... 51
5.3 External interface ..................................................................................................... 51
5.3.1 Connections .......................................................................................................... 52
Continuous valve actuator CHEOPS control
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As of: Jul-11 (Subject to change without notice) Page 3 of 71
5.3.2 Input E1 ................................................................................................................ 52
5.3.3 Input E2 ................................................................................................................ 53
5.4 Monitoring the actual value ...................................................................................... 54
5.4.1 Application ........................................................................................................... 54
5.4.2 Principle ............................................................................................................... 54
5.4.3 Practice ................................................................................................................. 54
5.5 Valves and valve seals .............................................................................................. 56
5.5.1 Valve structure ..................................................................................................... 56
5.5.2 Valves and valve seals .......................................................................................... 56
5.6 Limit of actuating value ........................................................................................... 57
5.6.1 Minimum actuating value ..................................................................................... 57
5.7 Determine the maximum actuating value ................................................................. 58
5.7.1 Application ........................................................................................................... 58
5.7.2 Principle ............................................................................................................... 58
5.7.3 Practice ................................................................................................................. 58
5.8 2-step heating ........................................................................................................... 59
5.9 Temperature control ................................................................................................. 60
5.9.1 Introduction .......................................................................................................... 60
5.9.2 Response of the P-control .................................................................................... 61
5.9.3 Response of the PI-control ................................................................................... 62
6 Troubleshooting ............................................................................................................... 63
6.1 Display current valve position .................................................................................. 64
6.2 Read-out error code .................................................................................................. 65
6.3 Checking end position .............................................................................................. 67
6.4 Checking adapter ring .............................................................................................. 68
6.5 Reading the software version number ...................................................................... 68
7 Glossary ............................................................................................................................ 70
7.1 Basic set point value ................................................................................................. 70
7.2 Hysteresis ................................................................................................................. 70
7.3 Continuous and switching control ............................................................................ 70
7.4 Dead zone ................................................................................................................. 71
7.5 Valve stroke .............................................................................................................. 71
Continuous valve actuator CHEOPS control
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1 Functional characteristics
The Cheops control drive actuator is both a continuous EIB room temperature controller and
an actuator, i.e. Cheops control measures the current room temperature (actual value) and
controls the radiator valve, in order to achieve the desired room temperature (set point value).
The valve position can be transferred on the bus. If a room accommodates several radiators,
these can be equipped with “Cheops drive” actuators and actuated by Cheops control.
In addition to the heating system, Cheops control can also control a cooling system.
In order to simply adapt to the set point values in respect of living comfort and energy saving,
Cheops control has 4 operating modes:
• Comfort
• Standby
• Night mode
• Frost protection mode
A set point value is assigned to each operating mode.
Comfort mode is used when the room is occupied
In Standby mode, the set point value is reduced slightly. This operating mode is used when
the room is not occupied but is expected to be shortly.
In Night mode, the set point value is drastically reduced, since the room is not expected to be
occupied for several hours.
In Frost protection mode, the room is controlled to a temperature that eliminates the risk of
damage to the radiators through freezing at low outdoor temperatures:
This can be desirable for 2 reasons:
- The room is not occupied for several days.
- A window has been opened and no further heating is required for the time being.
The operating modes are usually controlled by a timer.
For optimum control, however, presence indicator and/or presence button and window
contacts are recommended.
See also Chapter headed "Determining the current set point value".
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1.1 Operation
For operation and display functions, Cheops control is fitted with 5 LEDs, a blue and a red
button. The top 3 LEDs are red, the bottom 2 LEDs are blue.
The LEDs show the set point temperature, i.e. the desired room temperature.
The middle LED illuminates when the temperature determined by the Basic set point value
has been reached.
The 2 buttons can be used to adapt the set point value to suit the individual requirements of
the room user.
Pushing the red button increases the set point value by one programmed increment, this is
possible twice from the basic set point value (middle LED).
Pushing the blue button reduces the set point value by increments.
If Cheops control is not in comfort mode, or if the set point value has already been decreased
by 2 increments from the basic set point value, the bottom LED illuminates.
This indicates to the room user that the set point value cannot be further decreased.
When the red button is pushed, Cheops control automatically finds the correct function that
increases the set point value - this depends on the operating mode prior to the button being
pushed:
Table 1
Operating mode prior to pushing the red
button
Effect of pushing the red button
Comfort mode
Set point value increased by one increment
Standby
Switches to comfort operating mode by setting the
presence object - without time limit
Night and frost protection
Switches to comfort operating mode by setting the
presence object – for set time and comfort
extension
(see "Comfort extension in night mode" on the
"Operating mode" parameter page)
In comfort mode, the set point value can now be changed in increments as usual.
If the blue button is pressed until the bottom blue LED illuminates, the presence object is reset
and the original operating mode is restored.
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1.2 Benefits of Cheops Control
• Continuous P/PI room temperature control
• Heating mode + actuation of a cooling system via the EIB
• Alternative actuation of a second heating step with switching or continuous actuating
value
• 2 buttons for set point offset (up to +/- 3K)
• Infinite valve adjustment through continuous actuating value
• Internal temperature measurement possible via either EIB or an external temperature
sensor
• Valve position or set point value offset readout
• Emergency program on actual value failure
• Establishing the maximum actuating value
• Valve protection program
• External interface for window and presence contacts
• Actuating value limitation
• Precise adjustment to each valve
• Operation with both standard and inverted valves
• Site function for operation without application
• Large valve stroke enables adjustment to almost all valves
• Simple assembly with any valve adapter
1.2.1 Special features
• Monitoring of actual value
If the room temperature is measured via an external sensor or received via an object, Cheops
control can start an emergency program if the sensor or temperature transmitter fails.
• Determining the maximum actuating value (= maximum position)
To adapt the forward flow temperature, Cheops drive can send an acknowledgement to the
heating boiler regarding the current power requirement.
This can reduce its temperature if the requirement drops.
• Window and presence contact inputs
Cheops drive has 2 external inputs, one for a presence contact and
one for a window contact. These inputs can be used as an actuator for frost protection or
comfort mode.
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1.3 Hardware versions
There are 2 hardware versions of Cheops, up to 2008 and from 2008, with some different
features.
The version up to 2008 (left) has two circuit boards mounted at right-angles to each other.
The version from 2008 (right) only has one circuit board.
The different features of the two versions are indicated in this manual by "up to 2008"
and "from 2008".
Distributed software (firmware) versions (displayed by the LEDs see Reading the software
version number):
Devices up to 2008
Devices from 2008
V110
V121
V44 since March 2008
V63 since December 2008
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1.4 Differences
• Only one calibration
strategy
• The former positions
are adopted after reset
(small calibration)
• Valve protection
every 24 hours if
there is no change in
actuating value.
• Site function always
active (25% after
adjustment)
• Error code in $1FB
• Continuous light with
known errors
• New calibration
strategy: End position
via force with fixed
stroke.
• Cheops always
performs two
calibration runs and
compares the results
• Site function is fully
deleted after the first
download.
• No more error codes
• Changed LED display
during calibration run
• Corrective measures
are automatically
started in the event of
• New calibration
strategy:
Starting point as
position, end point via
force.
• Valve protection only
every 7 days
• Calibration strategy
code filed in address
in $1FB (N.B.:
Number can look like
the earlier error
codes).
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2 Technical data
2.1 General
Voltage supply:
Bus voltage
Permitted working temperature:
0°C ...+ 50°C
Runtime:
< 20s / mm
Controlling torque:
> 120 N
Max. control stroke:
7.5 mm (linear movement)
Detection of valve limit stops:
Automatic
Linearisation of characteristic valve curve:
Possible via software
Protection class:
III
Protection rating:
EN 60529: IP 21
Dimensions:
HxWxD 82 x 50 x 65 (mm)
Adapter rings suitable for:
Danfoss RA, Heimeier, MNG,
Schlösser from 3/93, Honeywell, Braukmann,
Dumser (Distributor), Reich (Distributor),
Landis + Gyr, Oventrop, Herb, Onda
Typical power consumption
Motor off: < 5 mA
Motor on, seal not pressed: 10 mA
Motor on, seal pressed: 12..15 mA
(depending on force)
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3 The "CHEOPS control V1.2"
Application Program
3.1 Selection in the product database
Manufacturer
Theben AG
Product family
Valve actuators
Product type
Valve actuator with controller
Program name
Cheops control V1.2
Download the application from: http://www.theben.de
3.2 Parameter pages
Table 2
Function
Description
Settings
Selection of control functions,
standard and user-defined settings
Device settings
Valve characteristics, fine setting of valve parameters, special
characteristic valve curves, valve protection
Set point values
Set point value after loading the application, values for
night/frost mode, dead zone, additional step etc.
Operation
Function of LEDs and buttons
Actual value
Selection, calibration, emergency program on failure
Heating control
Heating parameters, controller type, actuating value limits etc.
Cooling control
Cooling parameters, controller type etc.
Operating mode
Presence and window status considered.
Operating mode after download
External interface
Configure inputs for window / presence contact and actual value
Additional heating step
Control parameters, hysteresis reduction, bandwidth etc.
Own characteristic curve
of valve
Prof. parameters for valves with known characteristic curve
linear characteristic valve
curve
Parameters for high-end linear valve
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3.3 Communication objects
3.3.1 Object characteristics
Cheops control features 12 communication objects.
Objects 2, 3, 4, 5, 6 and 8 can assume various functions, depending on the configuration
Table 3
No.
Function
Object name
Type
Response
0
Define set point temperature
Basic set point value
2 byte
EIS5
Receive
1
shift set point temperature
Manual shift of set point value
2 byte
EIS5
Send /
Receive
2
Transmit actual value
Actual value
2 byte
EIS5
Send
Input actual value
Receive
3
Pre-selection of operating
mode
Pre-selection of operating
mode
1 byte
KNX
Receive
1 = night, 0 = standby
Night < - > Standby
1 bit
4
Input for presence signal
Presence
1 bit
Send /
receive
1 = comfort
Comfort
1 bit
Receive
5
Input of window state
Window state
1 bit
Send /
receive
1 = frost protection
Frost/heat protection
1 bit
Receive
6
1 = decrease/0 = increase
adjustment of set point
temperature
1 bit
Receive
Calculates maximum
actuating value
maximum actuating value
1 byte
EIS6
Send /
receive
0 .. 100%
Actual valve position
1 byte
EIS6
Send
7
Current actuating value
heating
actuating value heating
1 byte
EIS6
Send
8
Actuating value in cooling
mode
actuating value cooling
1 byte
EIS6
Send
Switching actuating value
Actuating value of additional
heating
1 bit
Send
Continuous actuating value
Actuating value of additional
heating
1 byte
EIS6
Send
9
Transmit
Current set point value
2 byte
EIS5
Send
10
Transmit
Current operating mode
1 byte
KNX
Send
11
Heating/cooling
Switchover
1 bit
Receive
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3.3.2 Object description
• Object 0 "Basic set point value"
The Basic set point value is first specified via the application at start-up and stored in the
"Basic set point value" object.
It can then be re-specified at any time via Object 0.
If the bus voltage fails, this object is backed up and the last value is restored when the bus
voltage returns.
• Object 1 "Manual shift of set point value"
The object sends and receives a temperature differential in EIS 5 format. The desired room
temperature (current set point value) can be adjusted from the Basic set point value by this
differential.
The following applies in comfort operation (heating):
current set point value (Obj. 9 = Basic set point value (Obj. 0) + manual set point value offset
(Obj. 1)
This value can be changed in increments by pressing the buttons on the device or via
Object 6. The value thus changed is then sent.
It is, however, possible to send the set point value offset directly to this object, this set point
value offset is then indicated on the LEDs.
Values outside the programmed range are not taken into consideration.
The offset always relates to the basic set point value that is either configured or programmed
via 0 and not the current set point value.
• Object 2 "Actual value"
The function of this object depends on the "Input for actual value" parameter on the "Actual
value" parameter page.
Table 4
Selection: Input for actual value
Function
Internal sensor
Sends the temperature currently being measured by the
sensor (if sending through configuration is permitted)
External sensor (Interface E2)
Actual value object
Receives the current room temperature from an external
EIB temperature sensor via the bus
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• Object 3 "Pre-selection of operating mode" / "Night <-> Standby"
The function of this object depends on the "Objects for determining operating mode"
parameter on the "Operating mode" parameter page.
Table 5
Objects for determining the operating
mode
Function
New: Operating mode, presence
window, window status
With this setting, the object is a 1 byte object. One
of 4 operating modes can be directly activated.
1 = comfort, 2 = standby, 3 = night,
4 = frost protection (heat protection)
The details in brackets relate to the cooling
operation
Old: Comfort, night, frost
With this setting, the object is a 1 bit object. Night
or standby operating mode can be activated.
0=standby 1=night
* If a different value from 1...4 is sent to object 3, then operating mode 1 = comfort is adopted
• Object 4 "Presence / comfort"
The function of this object depends on the "Objects for determining operating mode"
parameter on the "Operating mode" parameter page.
Table 6
Objects for determining the operating
mode
Function
New: Opertaing mode, presence
window, window status
The status of a presence indicator (e.g. sensor,
movement indicator) can be received via this object.
A 1 on this object activates the comfort operating
mode.
If a presence indicator is connected to Interface E2,
its status is sent via this object to the bus.
Old: Comfort, night, frost
A 1 on this object activates the comfort operating
mode.
This operating mode takes priority over night and
standby operation.
Comfort operation is deactivated by sending an 0 to
the object.
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• Object 5 "Window state" / "Frost/heat protection"
The function of this object depends on the "Objects for determining operating mode"
parameter on the "Operating mode" parameter page.
Table 7
Objects for determining the operating
mode
Function
New: Operating mode, presence
window, window status
The status of a window contact can be received via
this object.
A 1 on this object activates the frost / heat
protection operating mode.
If a window contact is connected to Interface E1, its
status is sent via this object to the bus.
Old: Comfort, night, frost
A 1 on this object activates the frost protection
operating mode.
During the cooling operation, the heat protection
mode is activated.
The frost/heat protection operating mode takes top
priority.
The frost/heat protection mode remains until it is
cleared again by a 0.
• Object 6 „"adjustment of set point temperature" / "maximum actuating value" /
"Actual valve position"
The function of this object depends on the "Function of Object 6" on the "Device setting"
parameter page.
Table 8
Function of Object 6
Function
Increases / decreases the set point value
This object can increase or decrease the current set
point value in increments.
A 0 on the object results in an increase in the set
point value and is equivalent to pressing the red
button.
A 1 on the object results in a decrease in the set
point value and is equivalent to pressing the blue
button.
The increment is set on the "Operation" parameter
page. The achieved offset can be reported by
Object 1.
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Continued:
Function of Object 6
Function
Determine the maximum actuating
value
This object has 2 functions here:
1. Receives actuating values from the other
actuators (other rooms), in order to be able
to compare them with its own.
2. Sends its own actuating value to the heating
boiler, if it is higher than the others.
(See also: Determining maximum actuating
value)
Sends the actual valve position
Sends the current valve position (0..100%).
This function can be enabled (e.g. diagnosis) as and
when required.
This function is not required for normal operation.
• Object 7 "Current actuating value, heating"
This object is present only when selected on the "Heating control" page as follows.
The current actuating value (0…100%) can then be sent to other continuous actuators (Cheops
drive) in the same room/control circuit.
If you wish to read out Object 7 via the bus, Object 8 must not be present ("Used control
functions" on the "Settings" parameter page set to "Heating control only"). The
"Read" flag must be set.
If you wish to read out Object 8 via the bus, this parameter must be set to "Not present".
• Object 8 "actuating value cooling"/"Actuating value of additional heating"
The function of this object depends on the "Input for actual value" parameter on the "Settings"
parameter page.
Table 9
Used control functions
Function
Heating and cooling
Sends the cooling actuating value to control a
cooling ceiling, fan coil unit etc.
2-step heating with switching additional
step
Sends the switching command to control the
additional step (on/off)
2-step heating with continuous
additional step
Sends the continuous actuating value to control the
additional step (0…100%)
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Note:
In the "Heating control" setting, the object is not available because neither the cooling
function nor the additional step are present.
If you wish to read out Object 8 via the bus, Object 7 must be hidden (see above) and the
"Read" flag must be set.
• Object 9 "Current set point value"
This object sends the Current set point temperature as a EIS 5 telegram (2 bytes) on the bus.
The send response can be set on the "Heating control" parameter page.
• Object 10 "Current operating mode"
This object sends the current operating mode as a 1 byte value.
The send response can be set on the "Operating mode" parameter page.
The operating modes are coded as follows:
Table 10
Value
Operating mode
1
Comfort
2
Standby
3
Night
4
Frost protection/heat
protection
• Object 11 "Switchover"
This object is available if an automatic switching between heating and cooling is not required.
The setting is made on the "Cooling control" parameter page
The cooling operation is forced via a 1 and the heating operation via a 0.
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3.4 Parameters
3.4.1 Settings
Table 11
Designation
Values
Meaning
Control
Standard
User-defined
For simple applications
For specific setting of the
control parameters and special
applications such as
heating/cooling or
2nd heating step.
Control functions
Heating control only
Heating and cooling
2-step heating with switching
additional step
2-step heating with continuous
additional step
User-defined control:
Heating operation only
A cooling unit can also be
controlled via the bus (Object
8)
A main step (typically floor
heating) and an additional
step (On/Off) can be
controlled.
A main step (typically floor
heating) and an additional
step (radiator) can be
controlled.
Operation
Standard
User-defined
Function of keys and LEDs.
Default setting
Opens the parameter page
"Operation"
Operating mode
Standard
User-defined
Default settings
Opens the parameter page
"Operating mode"
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Continued:
Designation
Values
Meaning
Device settings
Standard
User-defined
Default settings
Opens the parameter page
Device settings
Function of external
interface
None
E1: Window contact, E2:
Presence
E1: Window contact, E2: Actual
value
E1: Window contact, E2: None
Specifies whether the external
interface is occupied by
window presence contact or
an external temperature
sensor is connected.
Note:
IF E2 is declared as actual
value input, the "Input for
actual value" selection cannot
be changed on the "Actual
value" parameter page.
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3.4.2 Set point values
Table 12
Designation
Values
Meaning
Basic set point value after
download of application
18 °C, 19 °C, 20 °C,
21 °C, 22 °C, 23 °C,
24 °C, 25 °C
Output set point value for the
temperature control.
Reduction in standby
operating mode at heating
0,5 K, 1 K, 1,5 K
2 K, 2.5 K, 3 K
3,5 K, 4 K
Example: with a basic set
point value of 21
o
and a
2K reduction in heating
operation, Cheops control
controls at a set point value of
21 – 2 = 19°C
Reduction in night operating
mode at heating
3 K, 4 K, 5 K
6 K, 7 K, 8 K
By what value should the
temperature be reduced in
night mode?
Set point value for frost
protection mode
3 °C, 4 °C, 5 °C
6°C, 7 °C, 8 °C
9 °C, 10 °C
Preset temperature for frost
protection operation in
heating mode
(Heat protection operation
applies in cooling mode).
Transmission of current set
point values
No cyclical transmission
Every 2 min
Every 3 min
Every 5 min
Every 10 min
Every 15 min
Every 20 min
Every 30 min
Every 45 min
Every 60 min
How often should the
currently valid Set point value
be sent?
Send only at a change.
Send cyclically
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Continued:
Designation
Values
Meaning
Parameters for heating / cooling operation
Dead zone between heating
and cooling
1 K, 1,5 K, 2 K,
2,5 K, 3 K, 3,5 K
4 K, 4,5 K, 5,5 K
6 K
Specifies the interval between
set point value in heating and
cooling operations.
Example with set point value
of 21°C and Dead zone of 2K:
Cheops will only start cooling
when the temperature ≥ Set
point value + Dead zone is,
i.e. 21°C + 2K = 23°C.
Increase in standby mode at
cooling
0,5 K, 1 K, 1,5 K
2 K, 2.5 K, 3 K
3,5 K, 4 K
The temperature is increased
in standby mode during
cooling operation
Increase in night mode at
cooling
3 K, 4 K, 5 K
6 K, 7 K, 8 K
See increase in standby mode
Set point value for heat
protection at cooling
42 °C (no heat protection)
29 °C, 30 °C, 31 °C
32 °C, 33 °C, 34 °C
35 °C
The heat protection represents
the maximum permitted
temperature for the controlled
room. It performs the same
function on cooling as frost
protection mode on heating,
e.g. saves energy while
prohibiting non-permitted
temperatures
Important:
In principle, Cheops control
will not allow a set point
value above 42
o
C (even via
bus set point value
definition)
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Continued:
Designation
Values
Meaning
Current set point value in
comfort mode
Transmit mean value between
heating and cooling
Transmit actual
temperature setpoint
(Heating < > Cooling)
Feedback of current set point
value via the bus:
Same value in comfort
operation mode during both
heating and cooling operation,
i.e.:
Basic set point value + half
dead zone
sent, to prevent room users
becoming irritated.
Example with basic set point
value of 21°C and dead zone
of 2K:
Mean value= 21°+1K =22°C
Although control takes place
at 21
o
C
and/or 23°C
The set point value actually
being controlled is always
sent.
Example with basic set point
value of 21°C and dead zone
of 2K:
During heating and cooling,
21°C and basic set point value
+ dead zone are sent
respectively (21°C + 2K =
23°C)
Parameters for 2-step heating
Differential between main
step and additional step
1 K, 1,5 K, 2 K,
2.5 K, 3 K, 3.5 K,
4 K
Specifies the negative interval
between the current set point
value and the set point value
of the additional step.
Example with basic set point
value of 21°C and 1K
differential:
Main step controls using the
basic set point value and the
additional step controls using
the basic set point value – 1K
= 20°C
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3.4.3 Actual value
Table 13
Designation
Values
Meaning
Input of actual value
Internal sensor
object Actual value
Cheops control can obtain its
actual value from three
sources. Selection can be
made from 2 such sources:
fitted sensor
bus (Object 2).
An external sensor can be
selected via the "Function of
external interface" parameter
on the Settings parameter
page. In this case, there is no
option to select between
internal sensor and actual
value object.
Temperature offset for
internal sensor
(in 0,1K, -64...63)
Manual input -64.. 63
Positive or negative
correction of measured
temperature in 1/10 K
increments
Example: Cheops sends
20.3°C. A room temperature
of 21.,0°C is measured using
a calibrated thermometer. In
order to increase the
temperature of Cheops to 21
°C,
an "7" (i.e. 7 x 0.1K) must be
entered.
Cheops sends 21.3°C. 20.5°C
is measured. In order to
reduce the temperature of
Cheops to 20.5 °C,
an "-8" (i.e. -8 x 0.1K) must
be entered.
Transmission of actual value
at change
Does not send
by 0,2 K, 0,3 K
by 0.5 K, 0.7 K
by 1 K, 1.5 K
2 K
Is the current room
temperature to be sent?
If so, from which minimum
change should this be sent
again?
This setting keeps the bus
load as low as possible.
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Continued:
Designation
Values
Meaning
Transmission of actual value
no cyclical transmission
Every 2 min
Every 3 min
Every 5 min
Every 10 min
Every 15 min
Every 20 min
Every 30 min
Every 45 min
Every 60 min
How often should the values
be sent, regardless of the
temperature changes?
Parameters for external sensors
Temperature offset for
external sensor (in 0.1K, -
64...63)
Manual input -64.. 63
See above, Temperature
offset for internal sensor
Position in case of failure of
actual value or sensor
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
Continued control with
internal sensor
Cheops control continuously
monitors the function of the
external sensor when selected.
If the line to this sensor is
interrupted or short-circuited,
Cheops control can either
assume a fixed position
(emergency program) or
switch to an integrated sensor
until the fault is cleared.
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3.4.4 Heating control
Table 14
Designation
Values
Meaning
Setting of control parameters
Via type of system
User-defined
Standard application
Prof. application Self-
configure P/PI control
Type of system
Radiator heating
floor heating
PI control with:
Integrated time = 150 minutes
Bandwidth = 4 k
Integrated time = 210 minutes
Bandwidth = 6 k
Minimum actuating value in
heating mode
0%, 5%, 10%
15%, 20%, 25%
30%, 40%
Smallest permitted actuating
value (Exception: actuating
value of 0% is always used)
Behaviour at minimum
actuating value underflow
(heating mode)
0%
0 % = 0 % otherwise min.
actuating value
Run to 0% as soon as the
defined min. actuating value
is underrun.
Runs to the min. actuating
value as long as the value is
greater than 0% and smaller
or equivalent to the min.
actuating value.
However, if a actuating value
of 0%
is required (set point
temperature reached), Cheops
control returns to 0%.
Object “actuating value
heating”
available
not available
The heating actuating value is
not to be sent on the bus
(Object 8 can be read).
The heating actuating value is
required to control other
actuators (Cheops drive).
Object 7 is added.
Transmission of actuating
value heating
At change by 1%
At change by 2 %
At change by 3 %
At change by 5 %
At change by 7 %
At change by 10 %
At change by 15 %
After how many % change*
in the actuating value is the
new value to be sent.
Small values increase control
accuracy but also the bus
load.
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Continued:
Designation
Values
Meaning
Transmission of actuating
value heating
no cyclical transmission
Every 2 min
Every 3 min
Every 5 min
Every 10 min
Every 15 min
Every 20 min
Every 30 min
Every 45 min
Every 60 min
How often is the current
heating actuating value to be
send, regardless of changes?
User-defined parameters
Proportional band of heating
control
2 K, 2.5 K, 3 K
3,5 K, 4 K, 4,5 K
5 K, 5,5 K, 6 K
6.5 K, 7 K, 7.5 K
8 K, 8.5 K
Prof. setting to adapt the
control response to the room.
Integral action time constant
of heating controller
Only proportional controller
30 min, 45 min, 60 min
75 min, 90 min, 105 min
120 min, 135 min, 150 min
165 min, 180 min, 195 min
210 min, 225 min
see Appendix
Temperature control
For PI control only:
The integrated time
determines the reaction time
of the control.
For radiators, times of approx.
150 min and for floor heating,
longer times of approx. 210
min are recommended.
These times can be adapted to
suit particular circumstances.
If the heating is over-
dimensioned and therefore too
fast, shorter values should be
used. Conversely, under-
dimensioned heating (slow)
benefits from longer
integrated times.
*Change since last sending
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3.4.5 Cooling control
Table 15
Designation
Values
Meaning
Setting of control parameters
Via type of system
User-defined
Standard application
Prof. application Self-
configure P/PI control
Type of system
Cooling ceiling
Fan Coil Unit
PI control with:
Integrated time = 90 minutes
Bandwidth = 4 k
Integrated time = 180 minutes
Bandwidth = 4 k
Transmission of actuating
value cooling
On change by 1%
On change by 2 %
On change by 3 %
On change by 5 %
On change by 7 %
On change by 10 %
On change by 15 %
After how many % change*
in the actuating value is the
new value to be sent.
Small values increase control
accuracy but also the bus
load.
Switch over between heating
and cooling
Automatically
via object
Cheops control automatically
switches to cooling mode
when the actual temperature
is above the threshold:
set point value + dead zone.
Cooling mode can be
activated only on the bus side
via Object 11 (1= cooling).
Cooling mode remains off for
as long as this object is reset
(=0).
User-defined parameters
Proportional band of cooling
controller
2 K, 2,5 K, 3 K
3,5 K, 4 K, 4,5 K
5 K, 5,5 K, 6 K
6.5 K, 7 K, 7.5 K
8 K, 8.5 K
Prof. setting to adapt the
Control behaviour to the
room.
Large values cause finer
changes to the actuating
values with the same control
deviation and a more precise
control than smaller values.
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Continued:
Designation
Values
Meaning
Integral time of the cooling
controller
Pure P control
30 min, 45 min, 60 min
75 min, 90 min, 105 min
120 min, 135 min, 150 min
165 min, 180 min, 195 min
210 min, 225 min
see Appendix
Temperature control
For PI control only:
The integrated time
determines the reaction time
of the control.
These times can be adapted to
suit particular circumstances.
If the cooling system is over-
dimensioned and therefore too
fast, shorter values should be
used. Conversely, under-
dimensioned cooling (slow)
benefits from longer
integrated times.
*Change since last sending
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3.4.6 Additional heating step
See also Appendix: 2-step heating
Table 16
Designation
Values
Meaning
Hysteresis
0,3 K
0,5 K
0,7 K
1 K
1.5 K
Interval between the switch-
off point (set point value) and
the re-switch on point (Set
point value – hysteresis).
The hysteresis prevents
constant switch on/off.
Feedback of hysteresis
controlled with switch point
None
0,1 K/min
0,2 K/min
0.3 K/min
The feedback causes a
gradual decrease in the
Hysteresis over time.
This increases control
accuracy.
The hysteresis is equivalent to
the programmed value for
each switch-off and is
gradually reduced by the
feedback process. The
hysteresis can reduce to 0
over prolonged periods of
switch-off.
At the next switch-on, it is
reset to the configured value.
Cyclical transmission of
additional heating system
No cyclical transmission
Every 2 min
Every 3 min
Every 5 min
Every 10 min
Every 15 min
Every 20 min
Every 30 min
Every 45 min
Every 60 min
How often should the
switching status of the
additional step be sent?
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Continued:
Designation
Values
Meaning
Parameters for continuous additional step
Proportional band of
additional heating system
2 K, 2,5 K, 3 K
3,5 K, 4 K, 4,5 K
5 K, 5,5 K, 6 K
6.5 K, 7 K, 7.5 K
8 K, 8.5 K
Prof. setting to adapt the
control response to the room.
Large values cause finer
changes to the actuating
values with the same control
deviation and a more precise
control than smaller values.
Transmission of actuating
value of additional heating
system
On change by 1%
On change by 2 %
On change by 3 %
On change by 5 %
On change by 7 %
On change by 10 %
On change by 15 %
After how many % change*
in the actuating value is the
new value to be sent.
Small values increase control
accuracy but also the bus
load.
*Change since last sending
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3.4.7 Operation
Table 17
Designation
Values
Meaning
Function of LEDs
None
Indication of set point value
shift
Fixed indication of position
Time-limited display of set
point val. shift
The LEDs are always off
The middle LED illuminates
if no offset has been entered.
The remainder indicate an
upward or downward offset
increment
The 5 LEDs show the current
valve position as follows
(from bottom to top):
All OFF: Position 0%
1st LED: Position > 0…20%
2nd LED: Position >
20..00,40%
3rd LED: Position >
40..00,60%
4th LED: Position >
60..00,80%
5th LED: Position >
80..0.100%
The current set point value
offset is displayed for 10s
after a key is pressed.
Otherwise, all LEDs remain
off.
Function of push buttons
Enabled
Disabled
The keys can be operated.
Hint: Pushing both keys at the
same time displays the current
valve position on the LEDs
(see above, fixed position
display).
Safeguards against undesired
operation
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Continued:
Designation
Values
Meaning
Maximum shift of set point
value
+/-1 K (1 push button stroke
corresponds to 0,5 K)
+/-2 K (1 push button stroke
corresponds to 1,0 K)
+/-3 K (1 push button stroke
corresponds to 1,5 K)
+/-4 K (1 push button stroke
corresponds to 2,0 K)
+/-5 K (1 push button stroke
corresponds to 2.5 K)
What is the max. amount by
which the the set point value
can be changed and how large
is the change at each
increment/key pressure?
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3.4.8 Operating mode
Table 18
Designation
Values
Meaning
Objects to select operating
mode
New: Operating mode,
presence, window state
Old: Comfort, night, frost
Cheops control can also
respond to window and
presence contact.
Conventional setting
Operating mode after
download of application
Frost protection
Night reduction
Standby
Comfort
Operating mode after start-up,
re-programming or return of
bus voltage
Type of presence sensor
(on Obj. 4 or Ext. interface)
Presence detector
Push button
The presence sensor activates
comfort mode
Comfort mode as long as
presence is detected
1. The presence object is
reset on change of
operating mode
definition object
(Object 3).
2. If the presence object
is set during night
operation, it is reset
after the configured
comfort extension
finishes (see below).
Comfort extension during
night operation
(with presence key)
Comfort mode extension via
red push button in night mode
None
30 min
1 hour
1,5 hours
2 hours
2,5 hours
3 hours
3.5 hours
Party switching:
enables the red key or
presence key to switch
Cheops control from night to
comfort mode for a certain
period.
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Continued:
Designation
Values
Meaning
Transmission of current
operating mode
No cyclical transmission
Every 2 min
Every 3 min
Every 5 min
Every 10 min
Every 15 min
Every 20 min
Every 30 min
Every 45 min
Every 60 min
How often should the current
operating mode be sent?
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3.4.9 Device settings
Table 19
Designation
Values
Meaning
Direction of control action
of valve
Normal (closed with pushed
tappet)
Inverted, (open with pushed
tappet)
For all standard valves
Adjustment to inverted valves
Strategy for identifying
valve
Standard
Standard identification for
most valve models.
Automatic
Only for devices from
software V63.
The valve is closed with a
pre-defined force (see below,
"Closing force for"
parameter).
The 0 % position is checked
at the valve with every run
and the “100 % open”
position is measured at the
valve.
With defined valve stroke
Only for devices from
software V63.
The 0 % position is checked
at the valve with every run
and the
100 % (open) position is
established from the set
stroke.
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Continuation:
Designation
Values
Application
Strategy = Standard
Additional pressing of
rubber seal in 1/100mm
0..79
(Default = 20)
The set value determines the
additional pressing in 1/100
mm.
This allows the valve to be
further closed by a set path
if, due to the characteristics of
the rubber seal, it fails to
close completely.
Caution: In order to avoid
seal damage, the value should
be increased by max. 10
increments.
Setting:
1 is equivalent to 1/100mm
10 is equivalent to 0.1 mm
20 is equivalent to 0.2 mm
etc.
See appendix: Valves and
valve seals
Strategy = Automatic (from SW V63)
Closing force for
Standard valves
Valves with high spring tension
This parameter determines the
closing force for the 0 %
position
Strategy = With defined valve stroke (from SW V63)
Closing force for
Standard valves
Valves with high spring tension
See above.
Valve stroke
2 mm, 3 mm, 4 mm,
5 mm, 6 mm
The traverse from the 0% to
the 100 % position are set
manually.
Valve protection
active
inactive
This function prevents the
valve from stopping if it is not
actuated for a prolonged
period.
The valve protection program
(if active) is always run if
after 24 hrs the control
variable has not changed.
In this case, the valve is
completely opened and then
closed.
This procedure is not
indicated on the LEDs.
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Continuation:
Designation
Values
Application
Type of valve seal
Valve with Standard seal
Valve with hard seal
Valve with soft seal
Valve with medium-soft seal
This parameter should be
changed only if the valve does
not open with low actuating
values.
(see Troubleshooting)
Characteristic curve of
valve
Typical characteristic curve
Own characteristic curve
Linear characteristic curve
For all standard valve types
For special valves with
known characteristic curves
or for special applications
For high-quality valves that
have flows proportional to the
path of the valve tappet.
Designation
Values
Meaning
Valve protection*
Active
Inactive
This function prevents the
valve from stopping if it is not
actuated for a prolonged
period.
The valve protection program
(if active) is always run if
after 24 hrs the actuating
value has not changed.
In this case, the valve is
completely opened and then
closed.
This procedure is not
indicated on the LEDs.
drive to new valve position
Position always accurate
At change of actuating value >1
%
At change of actuating value >2
%
At change of actuating value >3
%
At change of actuating value >5
%
At change of actuating value >7
%
At change of actuating value >10
%
At change of actuating value >15
%
The valve is re-positioned
each time the actuating value
is changed.
The valve is never re-
positioned until the actuating
value has changed from the
last position by more than the
set value. Enables frequent,
small positioning increments
to be suppressed
Important:
Too high a value can affect
the temperature control.
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Continuation:
Designation
Values
Application
Function of Object 6
Increase or decrease set point
value
Determines maximum actuating
value
Sends the actual valve position
Change set point value in
increments via Object 6
Object 6 Determining the
maximum actuating actuating
value
Object 6 sends the current
valve position during the
tappet movement.
This setting is most suitable
for diagnostic operations
Designation
Values
Meaning
Transmission of maximum
actuating value
when internal actuating value
is higher than the received
Every 2 min
Every 3 min
Every 5 min
Every 10 min
Every 15 min
Every 20 min
Every 30 min
Every 45 min
Every 60 min
Object 6 will only send if all
other actuators have a smaller
actuating value
Object 6 sends its actuating
value cyclically and starts a
new calibration
Transmission of actual
valve position
Does not send
At change of 1%
At change of 2 %
At change of 3 %
At change of 5 %
At change of 7 %
At change of 10 %
At change of 15 %
Sends the new valve position
as soon as it has changed
since the last sending by the
configured amount.
At the end of positioning, the
achieved value is sent
regardless of the configured
interval.
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3.4.10 External interface
See also "External interface" Appendix
Table 20
Designation
Values
Meaning
Type of connected window
contact
Window open = contact closed,
Window open = contact open
Enables both NC and NO
contacts to be used
If several contacts are present,
these must be switched in
parallel
If several contacts are present,
these must be switched in
series
Transmission of window
state
No transmission
Only in case of change
at change and cyclically with
actual operating mode
Is the status of the connected
window contact to be sent to
the bus?
Same cycle time as for
sending current operating
mode
Type of connected
presence contact
Present = contact closed,
Present = contact open
Enables both NC and NO
contacts to be used
Transmission of presence
status
No transmission
Only in case of change
at change and cyclically with
actual operating mode
Is the status of the connected
presence contact to be sent to
the bus?
Same cycle time as for
sending current operating
mode
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3.4.11 Linear characteristic valve curve
This setting should be used only for valves described exclusively as linear.
Note: The values can be shown but not changed in this table.
Table 21
Designation
Values
Meaning
Valve position in % for 10%
volume flow (1..99)
10
At 10% valve stroke, a
volumetric flow of 10% is
reached, at 20%, a volumetric
flow of 20% is reached etc.
Valve position in % for 20 %
volume flow (1..99)
20
Valve position in % for 30 %
volume flow (1..99)
30
Valve position in % for 40 %
volume flow (1..99)
40
Valve position in % for 50 %
volume flow (1..99)
50
Valve position in % for 60 %
volume flow (1..99)
60
Valve position in % for 70 %
volume flow (1..99)
70
Valve position in % for 80 %
volume flow (1..99)
80
Valve position in % for 90 %
volume flow (1..99)
90
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3.4.12 Own characteristic valve curve
Prof. setting for special valves.
This parameter appears only when an internal characteristic valve curve has been selected
from the "Unit settings" page.
The actuator response can be accurately adjusted using the characteristic valve curve
(manufacturer’s documentation).
This parameter enables the Cheops control to be adjusted on a valve at 9 points of the
characteristic curve (10%.....90%). A certain flow is reached for each point at a certain % of
the valve stroke.
Table 22
Designation
Values
Meaning
Valve position in % for 10%
volume flow (1..99)
1..99 (10)
At what % valve stroke is a
volumetric flow of 10%
reached?
Valve position in % for 20 %
volume flow (1..99)
1..99 (20)
At what % valve stroke is a
volumetric flow of 20%
reached?
Valve position in % for 30 %
volume flow (1..99)
1..99 (30)
At what % valve stroke is a
volumetric flow of 30%
reached?
Valve position in % for 40 %
volume flow (1..99)
1..99 (40)
At what % valve stroke is a
volumetric flow of 40%
reached?
Valve position in % for 50 %
volume flow (1..99)
1..99 (50)
At what % valve stroke is a
volumetric flow of 50%
reached?
Valve position in % for 60 %
volume flow (1..99)
1..99 (60)
At what % valve stroke is a
volumetric flow of 60%
reached?
Valve position in % for 70 %
volume flow (1..99)
1..99 (70)
At what % valve stroke is a
volumetric flow of 70%
reached?
Valve position in % for 80 %
volume flow (1..99)
1..99 (80)
At what % valve stroke is a
volumetric flow of 80%
reached?
Valve position in % for 90 %
volume flow (1..99)
1..99 (90)
At what % valve stroke is a
volumetric flow of 90%
reached?
The values in brackets indicate a linear valve.
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Diagram 1 shows a characteristic valve curve, as occurs frequently in practice.
In this characteristic curve, a 30% flow occurs at a valve stroke as low as 10%. At a valve
stroke of 50%, the flow is over 80%.
Diagram 1
Example of a characteristic curve
0%
20%
40%
60%
80%
100%
0% 20% 40% 60% 80% 100%
Valve position
Volumetric flow
A linear characteristic curve as shown in Diagram 2 would be ideal for the control.
A non-linear characteristic curve can be linearised by inputting an own characteristic curve.
To do this, the valve position (stroke) at 10, 20.....90% is taken from Diagram 1 and "internal
characteristic curve" entered into the parameter page.
Diagram 2
Linear characteristic curve
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
0% 20% 40% 60% 80% 100%
Valve position
Volumetric flow
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4 Start-up
IMPORTANT INFORMATION.
• During maintenance work on the radiator, the actuator is always dismounted and the
valve securely closed by an alternative method
(original protective cap etc…). The valve could be unexpectedly opened, potentially
causing water damage, through either the control or the valve protector.
• Cheops must already be mounted on the valve when the application is downloaded,
otherwise no adaptation can take place.
4.1 Installation
First, the unit is mounted onto the valve using the correct adapter ring.
The bus voltage can then be applied.
This automatically starts the adaption process.
When does the adjustment process occur?
Automatic adjustment occurs for the first time after the bus voltage is applied in the Site
function, and afterwards each time the application is downloaded.
A new calibration run is performed at regular intervals after reset and during the course of the
heating phase.
In order to correct the changes of the Valve characteristics over the course of time (aging of
the rubber seal), the valve is automatically remeasured on a regular basis.
NOTE:
• If an adjusted device is mounted on a different valve, the adjustment process
must be repeated by downloading the application.
• The previously stored positions are deleted after a download.
The calibration run is performed twice on account of the plausibility test.
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4.2 Calibration strategies
2 additional calibration strategies from software V63.
The aim is to enable adjustment to maximum number of different valves.
The selection of the calibration strategy is made via input in the " Strategy for identifying
valve " parameter (Device settings).
4.2.1 Strategy 1, standard
The valve is measured during a calibration run (e.g. after reset) and the "valve open" and
"valve closed" positions are stored. The calibration run is performed twice after download and
the resulting values compared for plausibility. The calibration run is performed until two
successive matching value pairs have been measured. These values are then stored and the
positions used for future runs. The measured values are compared with the stored values
during the calibration run so that the process is only performed once for plausibility.
4.2.2 Strategy 2, Automatic (only for devices from software version 63/
61 drive)
With this option, only the "Open" valve position is calculated during the calibration run. In
order to close the valve, the actuator pushes out the tappet until the set force is exerted on the
valve. The following closing forces are available:
Closing force for
Closing force
Standard valves
approx. 100 N
Valves with high spring tension
approx. 120 N
It is always recommended to use the "normal valve" setting first as this is completely
sufficient for most valves.
The "Valve with high spring tension" setting should only be tried if you cannot close the
valve. This enables the current consumption to be increased to 15 mA during the pressing of
the rubber seal.
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4.2.3 Strategy 3, with defined valve stroke. (Only for devices from
software version 63)
With this option, only the Open position of the valve is calculated by working back from a set
path from the closing position. In order to close the valve, the actuator pushes out the tappet
until the set force is exerted on the valve (closing force for standard valves/valves with high
spring tension).
This calibration strategy is primarily to be used if the actuator tappet touches the valve tappet,
even if it is completely withdrawn, and measurements cannot be performed.
With a completely unknown valve, the 3 mm with closing force for standard valves value is a
usable starting value.
It is always recommended to use the closing force for standard valves first.
This setting is completely suitable for most valves.
The Valve with high spring tension setting should only be tried if you cannot close the valve.
This enables the current consumption to be increased to 15 mA during the pressing of the
rubber seal.
The sequence light comes on if this calibration method fails three times.
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4.2.4 LED display during calibration run
LEDs
Version up to 2008
Version from 2008
Flashes as long as the spindle is in its maximum inner
position
4
3
2
1
0
Flashes until the 100 %
position has been found
Flashes while valve is
scanned
4
3
2
1
0
Flashes until the 0 %
position has been found
Flashes during position
calculation (can be very
brief)
4
3
2
1
0
“Settings” parameter page:
Applied control functions = Heating and cooling
“Set point values” parameter page:
Base set point value after loading the application = 21 °C
Dead zone between heating and cooling = 2 K
Increase in standby mode (during cooling) = 2 K
“Operation” parameter page
Maximum set point offset = +/-2 K (equivalent to 1.0 K keystroke)
The blue key is pressed once, i.e. the set point value is decreased by 1 K.
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4.3 Site function
While the unit remains in the delivered condition, i.e. no further applications have been
downloaded, Cheops control functions in field mode.
This function enables Cheops control to be used immediately on site with basic functions.
The set point temperature can be selected directly on the device using the red (+) and blue (-)
keys.
There are 5 set point temperature values available. The selected temperature is indicated on
the LEDs as follows.
22°C
20°C
18°C
16°C
5°C
This enables Cheops control to automatically control the room temperature during the period
between assembly and start-up by an EIB specialist.
The ETS database can be found on our download page: http://www.theben.de/downloads.htm.
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5 Appendix
5.1 Determining the current set point value
The current set point value can be adapted in line with certain requirements by selecting the
operating mode.
The operating mode can be specified by Objects 3…5.
There are two methods available:
5.1.1 New operating modes
If on the parameter page “operating mode”, new operating mode is selected by the " Objects
to select operating mode" parameter, the current operating mode can be defined as follows:
Table 23
Pre-selected operating
mode Object 3
Presence
Object 4
Window status
Object 5
Current operating
mode Object 10
Any
Any
1
Frost/heat protection
Any
1
0
Comfort
Comfort
0
0
Comfort
Standby
0
0
Standby
Night
0
0
Night
Frost/heat protection
0
0
Frost/heat protection
Typical application: In the mornings Object 3 activates "Standby" or "Comfort" mode and in
the evenings "Night" mode via a timer (e.g. TR 648).
During holiday periods, Object 3 also selects frost / heat protection via another channel of the
timer.
Object 4 is connected to a presence indicator. If a presence is detected, Cheops control
switches to Comfort mode (see Table).
Object 5 is connected to a window contact. As soon as a window is opened, Cheops control
switches to frost protection mode.
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5.1.2 Old operating modes
If on the parameter page, old operating mode is selected by the " Objects to select operating
mode" parameter, the current operating mode can be defined as follows:
Table 24
Night
Object 3
Comfort
Object 4
Frost / heat protection
Object 5
Current operating
mode Object 10
Any
Any
1
Frost/heat protection
Any
1
0
Comfort
Standby
0
0
Standby
Night
0
0
Night
Typical application: In the mornings "Standby" mode and in the evenings "Night" mode is
activated via a timer.
During holiday periods, Object 5 selects frost / heat protection via another channel on the
timer.
Object 4 is connected to a presence indicator. If a presence is detected, Cheops control
switches to Comfort mode (see Table).
Object 5 is connected to a window contact. As soon as a window is opened, Cheops control
switches to frost protection mode.
The old method has two advantages over the new method:
1. To switch from Comfort to Night operating mode, 2 telegrams (2 timer channels if
necessary) are required.
Object 4 must be set to 0 and object 3 to 1.
2. If during periods when "Frost / heat protection" is selected via the timer, the window
is opened and then closed again, the "Frost / heat protection" mode is cleared.
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5.1.3 Set point value calculations
Assuming the current operating mode, the current set point value of Cheops control is
calculated as follows:
A distinction is drawn between whether heating or cooling operation is currently required.
5.1.3.1 In heating operation
Table 25: Current set point value on heating
Operating mode
Current set point value
Comfort
Basic set point value + set point value offset
Standby
Basic set point value + set point value offset – reduction in standby mode
Night
Basic set point value + set point value offset – reduction in night mode
Frost/heat
protection
Programmed set point value for frost protection mode
Example:
Heating in comfort mode.
"Set point values" parameter page
"Operation" parameter page
The set point value has previously been increased by one step using the red key (1 keystroke)
Calculation:
Current set point value = basic set point value + set point value offset
= 21°C + 1K
= 22°C
If operation is switched to standby mode, the current set point value is calculated as follows:
Current set point value = basic set point value + set point value offset - reduction in standby
mode
= 21°C +1K -2K
= 20°C
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5.1.3.2 In cooling operation
Table 26: Current set point value on cooling
Operating
mode
Current set point value
Comfort
Basic set point value + set point value offset + dead zone
Standby
Basic set point value + set point value offset + dead zone + increase in standby
mode
Night
Basic set point value + set point value offset + dead zone + increase in night
mode
Frost/heat
protection
Programmed set point value for heat protection mode
Example:
Cooling in comfort mode.
The room temperature is too high and Cheops control has switched to cooling operation
Calculation:
Current set point value = basic set point value + set point value offset + dead zone
= 21°C -1K +2K
= 22°C
Changing to standby mode causes a further increase in the set point value (energy saving) and
gives rise to the following set point value.
Set point value = basic set point value + set point value offset + dead zone + increase in
standby mode
= 21°C - 1K + 2K + 2K
= 24°C
5.2 Set point value offset
The current set point value on Cheops control can be adapted in 3 ways:
• step by step by the red (+) and the blue (-) key
• in increments via Object 5 " adjustment of set point temperature "
• directly via Object 1 " Manual shift of set point value "
The differential between the set point value offset and the Basic set point value is sent by
Object 1 at each change (e.g. -1.00).
The offset limits are specified on the "Operation" parameter page by the "Maximum set point
value offset" parameter and apply for all 3 types of set point value offset.
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This parameter indicates the maximum permitted offset and the increment per keystroke (or
per activation of Object 6).
5.2.1 Incremental set point temperature adjustment via keys
Each time the blue key is pressed, the set point value is decreased by one increment.
Each time the red key is pressed, the set point value is decreased by one increment.
When the max. permitted offset is reached, further keystrokes have no effect.
5.2.2 Incremental set point temperature adjustment via Object 6
Each time a 1 is sent to Object 6, the set point value is decreased by one increment.
Each time a 0 is sent to Object 6, the set point value is increased by one increment.
When the max. permitted offset is reached, further send actions have no effect.
5.2.3 Direct set point temperature adjustment via Object 1
In this case, the set point value is changed by sending the desired offset to Object 1.
This involves the differential (may be preceded by a minus sign) being sent in EIS5 format.
The offset always relates to the programmed and not to the current set point value.
Example – Basic set point value 21°C:
If a value of 2.00 is sent to Object 1, the new set point value is calculated as follows:
21°C + 2,00K = 23.00°C.
To then bring the set point value to 22°C, the differential is resent to the programmed basic
set point value (here 21°C), in this case 1.00K (21°C+1.00K=22°C)
5.3 External interface
The external interface consists of inputs E1 and E2.
Both inputs are routed through the Cheops connection line.
The use of these inputs (presence sensor or actual value) is specified on the "Settings"
parameter page.
The inputs themselves are configured on the "External interface" parameter page.
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5.3.1 Connections
Table 27
Name
Colour
Function
BUS
Black (-)
EIB bus line
Red (+)
E1
Yellow
Binary input for window contacts(e)
Green
E2
White
Binary input for presence indicator, presence key or analogue input
for external temperature sensor
Brown
5.3.2 Input E1
E1 is used exclusively for window contacts (if present).
The window contacts can be connected to E1 directly and without additional supply voltage.
On the "External interface" parameter page, the Type of connected window contact
(Opener/closer) can be set.
When the "Open" window position is detected, Cheops control switches to frost operating
mode.
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5.3.3 Input E2
• E2 as binary input:
A presence indicator, switch or key can be directly connected here
If a presence indicator (or switch) is used, the period of comfort mode is determined by the
indicator, i.e. comfort mode remains in force for as long as presence is indicated.
If a presence key is used, operation switches without time limit from standby to comfort
mode when presence is indicated.
If presence is indicated during night operation, comfort mode is activated for a limited time.
Because the presence key is often not reset when the room is vacated, the presence input is
automatically reset when the defined operating mode is changed, so that a night reduction, for
example, can take place.
The selection between key and indicator is made on the "Operating mode" parameter page.
The type of presence contact can be set on the "External interface" parameter page.
• E2 as analogue input for an external sensor
With this configuration, all settings are made on the "Actual value" parameter side.
An external sensor (Order No. 907 0 191) is connected to E2.
The maximum permitted line length is 10m.
Important:
If E2 is declared as actual value input, the "Input for actual value" selection cannot be
changed on the "Actual value" parameter page.
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5.4 Monitoring the actual value
5.4.1 Application
Case 1: A sensor is connected to interface E2.
Its connection line could be inadvertently interrupted or short-circuited, e.g. during building
or renovation work.
Case 2: The temperature is determined by a different EIB device and sent to Cheops control.
This external temperature transmitter could fail (bus line short circuited etc…) and not longer
be able to perform its function, for a short time or permanently.
Because control is not possible if the actual value fails, this value must be monitored.
5.4.2 Principle
If an external sensor is connected to E2, it is constantly monitored for short-circuit or line
break.
If the temperature is received via Object 2, Cheops control can monitor whether new actual
value telegrams are received at regular intervals.
In both cases, either an emergency program can be started or further control can be handled
by the internal sensor, should the actual value fail.
5.4.3 Practice
The response is defined as follows on the "Actual value" parameter page:
• External sensor on E2
Emergency program (0…100%)
or internal measurement:
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• Receive actual value via Object 2
First the monitoring period must be defined.
This should be at least double the cycle time of the temperature transmitter (e.g. if the
temperature is sent to Cheops control every 5 minutes, the monitoring period must be at least
10 minutes).
The response to the actual value failure can then be programmed as above.
Emergency program (0…100%)
or internal measurement:
Important recommendation:
Rooms can cool down dramatically when the outdoor temperature is low. This may cause
radiators to freeze. To prevent this from happening, you must not select a too low position in
the emergency program.
A value of ≥ 30% is recommended.
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5.5 Valves and valve seals
5.5.1 Valve structure
Tappet
Rubber seal
Valve seat
5.5.2 Valves and valve seals
When idle, i.e. tappet not actuated, the tappet is pushed outwards by the spring and the valve
opens (100% with normal effect).
When the tappet is pushed, the rubber seal is pressed into the valve seat and the valve closes
(0% position with normal effect).
The valve does not close immediately on touching the valve seat, depending on the
characteristics, the existing tappet may have to move onwards until the valve is fully closed.
This response depends on the hardness, shape, aging or damage to the valve seal.
To correct the influence of this parameter, Cheops allows an additional pressing of the valve
seal to be entered (see also Troubleshooting).
Caution: In order to avoid seal damage, the value should be increased by max. 10
increments.
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5.6 Limit of actuating value
To control the temperature, Cheops control sets an actuating value of between 0% and 100%.
For practical reasons, it is not usually necessary to use the entire bandwidth of between 0%
and 100%).
5.6.1 Minimum actuating value
The unpleasant whistling noise that some valves can generate at low actuating value, can be
avoided by specifying a minimum actuating value.
If, for instance, this response is determined at below 8%, a minimum actuating value of 10%
is specified.
On receipt of a actuating value below the specified limit value, Cheops control can respond in
one of 2 ways ("Response on under-running the minimum actuating value in heating
operation"):
• Either move to immediately to 0% ("0%")
• or stop at the position of the minimum actuating value and do not close valve
completely until actuating value 0% is received (0%=0% otherwise minimum
actuating value)
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5.7 Determine the maximum actuating value
5.7.1 Application
If within a system all valve actuators are only slightly open, e.g. one at 5%, one at 12%,
another at 7% etc., the heating boiler can reduce its output because only a small amount of
heating energy is required.
In order to guarantee this, the heating boiler requires the following information:
How high is the actuating value in the room, which currently exhibits the greatest heat
requirement?
With Cheops valve actuators, this task is handled by the "Maximum position" function.
5.7.2 Principle
The actuating values are constantly compared between all participants (Cheops valve
actuators). Those participant with a higher actuating value than the one received may send it,
those with a smaller one may not.
In order to accelerate the process, the greater the difference between its own and the received
actuating value, the greater the speed at which the valve actuator sends.
Thus, the valve actuator with the highest actuating value sends first and beats the remainders.
5.7.3 Practice
The actuating value comparison takes place via Object 3 ("Maximum position") where
for each valve actuator, a common group address for the maximum position is placed on
Object 3.
In order to start the actuating value comparison between the participants, one (and only one)
participant must send a value to this group address cyclically.
This task can be handled by either boiler or valve actuator.
If it is the boiler, it must send the smallest possible value, i.e. 0%.
If it is a Cheops valve actuator, the parameter " Transmission of object
"Max. actuating value"(for boiler control)" on parameter page " Security and forced mode”
must be set to any cycle time.
This valve actuator then regularly sends its own actuating value and the others can respond
accordingly.
Irrespective of which participants act as initiator, the "Transm. of object “max. actuating
value” (for heating system)" must be set to the default value for all other valve actuators, see
Figure:
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5.8 2-step heating
A 2-step heating system consists of a slow main step and a fast additional step.
Typically, Cheops control is plugged into the floor heating system (main step) and the
radiators are controlled as the additional step.
Cheops controls the two steps in parallel, the additional step being controlled at a lower set
point value.
The differential between main and additional step is defined on the "Set point value"
parameter page.
Cheops drive valve actuators can be used as a continuous additional step (recommended).
Thermal valve actuators (Order No. 907 0 248) or possibly an electrical additional heater can
be used as a switching additional step.
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5.9 Temperature control
5.9.1 Introduction
Cheops Control can be used as a P or a PI controller, although the PI control is always
preferred.
With the proportional control (P control), the actuating value is rigidly adjusted to the
temperature differential.
The proportional integral control (PI control) is far more flexible, i.e. controls more quickly
and more accurately.
To explain the function of both temperature controls, the following example compares the
room to be heated with a vessel.
The filling level of the vessel denotes the room temperature.
The water supply denotes the radiator output.
The heat loss from the room is illustrated by a drain.
In our example, the maximum supply volume is 4 litres per minute and also denotes the
maximum radiator output.
This maximum output is achieved with an actuating value of 100%.
Accordingly, at an actuating value of 50%, only half the water volume, i.e. 2 litres per minute
would flow into our vessel.
The bandwidth is 4l.
This means that the controller will send an actuating value of 100% while the actual value is
smaller than or equal to (211 – 41) 171.
Function:
• Desired filling quantity:
21 litres (= set point value)
• From when should the supply flow gradually be reduced in order to avoid an
overflow? :
4l below the desired filling volume, i.e. at 21l – 41 = 171 (=bandwidth)
• Original filling volume
15l (=actual value)
• The losses amount to 1l/minute
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5.9.2 Response of the P-control
Max. 4l/Min.
Bandwidth
Set point value
Actual value
17l
21l
15l
Losses
1l/Min
A filling volume of 15l gives rise to a control deviation of 211 – 151 = 61
Because our actual value lies outside the bandwidth, the control will control the flow at 100%
i.e. at 4l / minute
The supply quantity (actuating value) is calculated from the control deviation
(set point value – actual value) and the bandwidth.
Actuating value = (control deviation / bandwidth) x 100
The table below shows the response and therefore also the limits of the P-control
Filling level
Actuating value
Supply
Losses
Increase in filling
level
15l
100%
4 l/min
1 l/min
3 l/min
19l
50%
2 l/min
1 l/min
20l
25%
1 l/min
0 l/min
The last line indicates that the filling level cannot increase any further, because the flow
allows only the same amount of water to flow in as can flow out through loss.
The result is a permanent control deviation of 11 and the set point value can never be reached.
If the loss was 1l higher, the permanent control deviation would increase by the same amount
and the filling level would never exceed the 19l mark.
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P-control as temperature control
The P-control behaves during heating control as shown in the previous example.
The set point temperature (21
o
C) can never quite be reached.
The permanent control deviation increases as the heat loss increases and as the ambient
temperature decreases.
5.9.3 Response of the PI-control
Unlike the pure P-control, the PI-control works dynamically.
With this type of control, the actuating value will not remain unchanged, even at constant
deviation.
In the first instant, the PI-control sends the same actuating value as the P-control, although the
longer the set point value is not reached, the more this value increases.
This increases is time-controlled over the integration time.
With this calculation method, the actuating value does not change if the set point value and
the actual value are the same.
Our example, therefore, shows equivalent in and outflow.
Notes on temperature control:
Effective control depends on agreement of bandwidth and integration time with the room to
be heated.
The bandwidth influences the increment of the actuating value change:
Large bandwidth = finer increment on actuating value change.
The integration time influences the response time to temperature changes:
Long integration time = slow response.
Poor agreement can result in either the set point value being exceeded (overshoot) or the
control taking too long to reach the set point value.
Usually, the best results are achieved with the standard settings or the settings via system
type.
Standard settings:
Control by system type
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6 Troubleshooting
Caution: Error codes are only available in the version up to 2008.
Table 28
Response
Error
code
Potential cause
Remedy
All LEDs flash as
continuous light
from bottom to top,
i.e. valve adaption
was unsuccessful
82
No valve
Plug unit onto valve and
reload application
84
Valve tappet is already
touched, although the spindle
of the valve actuator is fully
returned.
Use other valve adapter.
Please contact our Customer
Service.
When the spindle is returned,
the valve tappet must be at
least 3/10 mm away from the
spindle (see below, Check
adapter ring).
81
Valve tappet cannot be moved,
even with maximum force
(120N).
Check whether tappet sits
correctly, if so, replace valve.
81
Following start-up, valve
actuator with valve was
mounted onto a different valve
and must be readapted.
Re-download the application,
valve actuator is then
automatically adapted
81
Valve seal too heavily pressed
Cancel additional pressing of
rubber seal
83
Valve jams
Check valve
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Table 29: General, for every hard and software version.
Response
Potential cause
Remedy
Valve does not close when
actuating value is 0%
Valve seal is insufficient for
pressing onto the valve seat
Enter additional pressing of
rubber seal.
Caution: Increase parameter
by max. increments of 10.
OR (from 2008):
Choose another calibration
strategy.
Valve seal is damaged
Replace valve.
Valve opens only with an
unexpectedly large actuating
value
Existing valve seal is too soft
Adapt parameter type of valve
seal.
Valve opens only with
actuating values over:
5% ⇒Standard valve seal
10% ⇒ medium-soft seal
20% ⇒ select soft seal
Valve does not move to
positions below or above a
certain value
Minimum or maximum
actuating value parameter(s)
have been changed
Check minimum and
maximum actuating value
parameters
No LED display and no
automatic adaption
after reset
Device was unloaded with
ETS software
Reload individual address
+ application program
Error message with ETS
device info / Application
program:
Run state
Halted
Device was unloaded with
ETS software
Reload individual address
+ application program
6.1 Display current valve position
The current valve position can be viewed by simultaneously the blue and red buttons.
Position:
80..100%
60..80%
40..60%
20..40%
1..20%
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6.2 Read-out error code
Important:
The error code was replaced (from 2008) by the calibration strategy code.
Up to 2008:
If the valve causes an error message and the LEDs flash as continuous light, Cheops generates
an error code.
This remains in the BCU memory and can (start-up/test) be read-out using the ETS software.
1. Select device in the project and click on Test / Device memory viewer menu item
2. Enter memory area 1FB, deselect RAM and EEPROM
3. Click the button
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4. The error code appears in the results window
ERROR CODE
Table 30
Code
Name
00
No error
81
Overload switch-off
(overcurrent)
82
Valve not found
83
Valve does not move
84
Stroke too short
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6.3 Checking end position
The end positions stored during the adaption process can be read out in exactly the same way
as the error numbers using the ETS software.
The internal stop position (spindle inserted, valve open) is stored in Hex-format under the
address $1FC and the external stop position under $1FD.
After downloading the application, these values are reset (i.e. $1FC = 00 and $1FD = FF).
The found stop positions are stored here following successful adaption.
If both addresses show 00 after adaption, the adaption is deemed to have been unsuccessful.
To determine the stop positions in millimetres, the values are converted into decimal and
divided by 20.
Example calculation:
Table 31
Position
Valve
Addres
s
Hexadecimal
Value
Equivalent
to decimal
value
Result
decimal value/20 =
Internal stop
Open
$1FC
24
36
1,8 mm
External stop
Close
d
$1FD
61
97
4,85 mm
The stroke is calculated from the two values as follows:
Stroke = external stop - internal stop
In our example:
Stroke = 4.85 – 1.8 mm = 3.05 mm
Limit values for successful adaption
The following values must be respected:
Table 32
Internal stop
External stop
Stroke
Dimension
Hex value
Dimension
Hex value
Dimension
Hex value
≥
0,3mm
≥
6
≤
7,5mm
≤
96
≥
1.2mm
≥
18
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6.4 Checking adapter ring
The maximum dimension between top edge of adapter ring and end of tappet is 4.7 mm.
If this dimension is over-run, an alternative adapter ring must be used.
Max. 4,7mm
6.5 Reading the software version number
Cheops displays the current software version via LEDs.
After reset, this is displayed as a binary number in three stages.
• Stage 1: Full display: All LEDs = ON
• Stage 2: LED 0 is ON and the upper 4 Bits are shown
(= Hi-Nibble, value: see table)
• Stage 3: LED 0 is ON and the lower 4 Bits are displayed (= Lo-Nibble).
•
The values of the individual LEDs are displayed as follows
LEDs
Value
4
8 (=2
3
)
3
4 (=2
2
)
2
2 (=2
1
)
1
1 (=2
0
)
0
none
The number is produced from the sum of the values of the illuminated
LEDs 1..4.
LED 0 is not counted.
Continuous valve actuator CHEOPS control
theben
As of: Jul-11 (Subject to change without notice) Page 69 of 71
6.5.1 Examples of different versions
Devices from 2008
Devices up to 2008
Example 1
Version 044
= $2C
(1 circuit
board)
Example 2
Version 061
= $3D
(1 circuit
board)
Example 3
Version 063
= $3F
(1 circuit
board)
Example 4
Version 110
= $6E
(2 circuit
boards)
Example 5
Version 121
= $79
(2 circuit
boards)
Stage 1 = All LEDs ON
4
4
4
4
4
3
3
3
3
3
2
2
2
2
2
1
1
1
1
1
0
0
0
0
0
Stage 2 = Hi-Nibble
4
4
4
4
4
3
3
3
3
3
2
2
2
2
2
1
1
1
1
1
0
0
0
0
0
Stage 3 = Lo-Nibble
4
4
4
4
4
3
3
3
3
3
2
2
2
2
2
1
1
1
1
1
0
0
0
0
0
00101100
= $2C
00111101
= $3D
00111111
= $3F
01101110
= $6E
01111001
= $79
Continuous valve actuator CHEOPS control
theben
As of: Jul-11 (Subject to change without notice) Page 70 of 71
7 Glossary
7.1 Basic set point value
The basic set point value is the standard temperature for comfort mode and the reference
temperature for reduction in standby and night modes.
The programmed basic set point value (see "Basic set point value after download of
application" is stored in Object 0 and can be changed at any time by sending a new value
to Object 0 (EIS5).
After reset (bus returned), the last used basic set point value is restored.
7.2 Hysteresis
On Cheops control, the hysteresis determines how far the temperature should drop below the
set point value before the control switches on the additional step again.
Example with set point value (additional step) 20
o
C, hysteresis 0.5 K and starting temperature
19
o
C.
The additional step is switched on and does not switch off again until the set point value (20
o
)
is reached.
The temperature falls and the additional step does not switch on again until 20°C-0.5K= 19.5°
is reached.
Without hysteresis, the controller would switch on and off continuously provided the
temperature is within the set point value range.
7.3 Continuous and switching control
With a continuous actuating value, the valve is brought to any position between 0% and
100%. This achieves in a pleasant and precise control.
A switching control has only 2 statuses, On or Off, i.e. in our case, valve fully open or fully
closed.
Continuous valve actuator CHEOPS control
theben
As of: Jul-11 (Subject to change without notice) Page 71 of 71
7.4 Dead zone
The dead zone is a buffer area between heating and cooling operation.
Neither heating nor cooling takes place within this dead zone.
If Cheops control switches to cooling operation, the set point value is increased internally by
the amount of the dead zone.
Without this buffer zone, the system would switch continuously between heating and cooling.
As soon as the set point value had been under-run, the heating would activate and when the
set point value would be achieved, cooling were to be started immediately and the
temperature would fall to below the set point value and switch on the heating again.
7.5 Valve stroke
Mechanical path that is between the two end positions, i.e. 0% (valve closed) and 100%
(valve fully open) covered (see Valve arrangement diagram).
… 18 …


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