Operating Instructions

Commissioning
Additional settings
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Siemens A5E36496664A_f
Smart Infrastructure 2021-10-11
6.6.2 Setting the PID controller
Setting the PID controller
If the PID controller is activated, the set ramp times are bypassed in p1120 and
p1121 (applies only to FW < V4.7 SP3).
● Therefore, define the following settings for smoothing times, ramp times and
controller.
Parameter Setting Function
p2200 1 Setting of the signal source for switching the technology
controller on/off.
p2253 r2224 Technology controller setpoint
● r755.0: Analog setpoint (AI0)
● r2224: Technology controller fixed value
● r2050.1: Setpoint fieldbus
p2257 30s * Technology controller setpoint ramp-up time
p2258 30s * Technology controller setpoint ramp-down time
p2264 r755.1 Technology controller actual value
r755.1: Analog actual value (AI1)
p2265 10s * Technology controller actual value filter time constant
p2267 120% Technology controller upper limit actual value
p2268 -20% Technology controller lower limit actual value
p2280 1 Technology controller proportional gain
p2285 30s * Technology controller integral time
P2293 30s * Technology controller ramp-up/ramp-down time
p2306 0 Technology controller fault-signal inversion (heating or cooling)
* The time settings, such as "Technology controller integral action time" are dependent on the used
frame size. For further information, refer to the Operating Instructions for the Control Unit
(A5E34257946B).
The recommended PID controller settings can be parameterized by means of a macro:
● P0010 = 1
● P0015 = 120 "PID settings for pumps or fans (only for optimization)"
● P0010 = 0