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Siemens LOGO Soft Comfort Online Help Manual

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5.3 Special functions
LOGO!Soft Comfort Online Help
330 Operating Instructions, 11/2017
5.3.5.5
Analog ramp
Short Description
The Analog Ramp instruction allows the output to be changed from the current level to the
selected level at a specified rate.
Connection
Description
Input
En
A change in the status from 0 to 1 at input En (
En
able) applies the start/stop
level (Offset "B" +
StSp
) to the output for 100 ms and starts the ramp operation
to the selected level.
A change in the status from 1 to 0 immediately sets the current level to Offset
"B", which makes output AQ equal to 0.
Input
Sel
SeI = 0: The step 1 (level 1) is selected.
SeI = 1: The step 2 (level 2) is selected.
A change in status of Sel causes the current level to start changing to the select-
ed level at the specified rate.
Input
St
A change in the status from 0 to 1 at input
St
(Decelerated Stop) causes the
current level to decrease at a constant rate until the start/stop level (Offset "B" +
StSp) is reached. The start/stop level is maintained for 100 ms and then the
current level is set to Offset "B", which makes output AQ equal to 0.
Parameter
L1 and L2:
Levels to be reached; value range for each level: -10000 to 20000
MaxL:
Maximum value that must not be exceeded.
Value range: -10000 to 20000
StSp:
Start/Stop offset: value that is added to Offset "B" to create the start/stop
level. If the Start/Stop offset is 0, then the start/stop level is Offset "B").
Value range: 0 to 20000
Rate:
Speed with which level 1, level 2 or offset is reached. Steps/seconds are
issued.
Value range: 1 to 10000
Gain
Value range: 0 to 10.00
Offset
Value range: -10000 to 10000
p:
Number of decimal places
Possible settings: 0, 1, 2, 3
Output
AQ
The output
AQ
is scaled using the formula:
(Current Level - Offset "B") / Gain "A"
Note: when AQ is displayed in p
arameter mode or message mode, it is displayed
as an unscaled value (engineering units: current level).
Value range for AQ: 0 to 32767
… 330 …


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