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RAM 712 KNX room thermostat for surface-mounted and flush-mounted installation
theben
Version: Dec-10 (subject to change) Page 19 of 65
Continuation:
Designation
Values
Application
2-point control
Hysteresis of 2 point control
0.3 K, 0.5 K, 0.7 K
1 K, 1.5 K, 2 K
3 K, 4 K, 5 K
6 K
Interval between the switch-
off point (setpoint value) and
the turn back on point
(setpoint value – hysteresis).
The hysteresis prevents
constant switching on/off.
Recirculation of hysteresis
after switching point
None
0.1 K/min
0.2 K/min
0.3 K/min
Recirculation causes a gradual
decrease 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
recirculation process. The
hysteresis can reduce to 0 K
over prolonged periods of
switch-off.
At the next switch-on, it is
reset to the configured value.
User-defined parameters
Proportional band of heating
control
1 K, 15 K, 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
Professional setting to adapt
the control response to the
room.
Small values cause large
changes in control variables,
larger values cause finer
control variable adjustment.
See appendix: Temperature
control
Integrated time of the heating
control
Pure P control
15 min., 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: Response of PI
control
The integrated time
determines the reaction time
of the control.
It lays down the increase that
the output control variable is
raised by, in addition to the P
share. The I- share remains
active for as long as there is a
control deviation. The I share
is added to the
P share.
19


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