4
BA1 and BA2 to ModBus I/O 1402-0328 (2) for heating circuit HK2
4
BA1 and BA2 to ModBus I/O 1402-0328 (3) for heating circuit HK3
2
[Übersicht > Service > Heizkreis 1…3]
This menu can only be selected after the application key number has been entered!
Parameter WE Adjustment range
Regelkreis (control circuit)
= 3-Punkt (three-step)
3-Punkt Continuous, three-step
2
[Übersicht > Parameter > Heizkreis 1…3]
Parameters WE Adjustment range
Kp 6.0 0.1 to 99.9
Tn 120 s 0 to 999 s
Ty 120 s 5 to 600 s
7.8 Continuous control
The control algorithm is adjusted separately for the control valves Rk1 to Rk3 of the heat
exchangers and for the heating circuit mixing valves HK1 to HK3.
The flow temperature can be controlled using a PID algorithm. The valve receives an analog 0 to
10 V signal. When a system deviation occurs, the proportional component immediately causes
the 0 to 10 V signal to change (the greater
K
P
, the greater the change). The integral components
becomes effective with time: T
N
represents the time which elapses until the integral component
has changed the output signal to the same extent as the immediate change performed by the
proportional component (the greater T
N
, the slower the rate of change). Due to the derivative
component, any change of the system deviation is incorporated into the output signal with a cer
-
tain gain (the greater
T
V
, the stronger the change).
Heat exchanger control circuit Rk1 to Rk3
The continuous signal is issued by the following binary outputs:
4
AA1 of the controller for heat exchanger control circuit Rk1
4
AA2 of the controller for heat exchanger control circuit Rk2
4
AA3 of the controller for heat exchanger control circuit Rk3
2
[Übersicht > Service > Wärmetauscher 1…3]
This menu can only be selected after the application key number has been entered!
40 EB 5571-2 EN
General functions
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