User Manual

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Siemens Universal controllers RMU710B, RMU720B, RMU730B CE1P3150en
Building Technologies Supply air temperature controller, demand-controlled (type P) 03.10.2011
Refrigeration setpoint
Heat setpoint
0%
Supply air
refr. demand
Supply air
heat demand
Supply air limit min = 15°C
Supply air limit max = 26 °C
Main menu > Commissioning > Settings > .... or
Main menu > Settings > Controller 1 > Setpoints >
Operating line Range Factory setting
Control action Slow, Medium, Fast Medium
Request evaluation Maximum, Average Maximum
Start ramp 00.00...59.55 m:s 20 min
The rate at which supply air setpoints are optimized is defined via the "Control
action" setting parameter.
In addition, you can also define how to evaluate the demand signal.
 Maximum: Only the largest heat or refrigeration demand signal is considered for
shifting.
 Average: All heating or refrigeration demand signals are considered as average
values for shifting.
Ramp-up serves as the transition period to collect representative demand signals
required to calculate setpoints ("Present setpoint for cooling", "Present setpoint for
heating").
The recommended values for ramp-up depend on the control response:
Control action Ramp-up
Slow 50 min
Medium 20 min
Fast 10 min
An additional universal shift is possible here. It takes priority over demand-
controlled optimization and can adjust the supply air setpoints above or below the
supply air limit value max / min.
Function diagram
Setting values
Control action
Evaluation of request
Ramp-up
Note