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7.8
Continuous control
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 incorpo-
rated into the output signal with a certain gain (the greater
T
V
, the stronger the change).
Functions
WE
Configuration
Control mode
three-step/0 to 10 V
1
2.0
120 sec
0 sec
45 sec
CO1, 2, 4 -> F12 - 1, Y_
K
P
(proportional gain) / 0.1 to 50.0
T
N
(reset time) / 1 to 999 sec
T
V
(derivative-action time) / 0 to 999 sec
T
Y
(transit time) / 15, 30 to 240 sec
7.9
Releasing a control circuit over the binary input
The release of a control circuit using the binary output only becomes effective when the re-
spective control circuit is in automatic mode (icon
). The released control circuitalways
works in automatic mode; the deactivated control circuitbehaves as if it were transferred to
stand-by mode. It remains active, however, in any case for processing of external demand.
The control loop can be released via the binary input when the binary input is either open
(bE = 0) or closed (bE = 1).
Note!
In systems with supplementary heating circuit without a valve (Anl 2.x, 4.x), BE15 only influ-
ences the operation of this heating circuit. In systems which only have supplementary heating
circuits with or without DHW heating (Anl 3.x), BE15 influences the operation of the entire
controller (except for processing of an external demand).
Functions
WE
Configuration
Release RK1 at BE15
0
1
CO1 -> F14 - 1
bE = 1, 0
Release RK2 at BE16
0
1
CO2 -> F14 - 1
bE = 1, 0
EB 5576 EN
75
System-wide functions