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11.2 Makeup and mode of operation of the
controller
PID control controls the main controlled variable according to the defined setpoint.
The controller can contain max 2 sequences in the following combinations:
One sequence: Sequence 1
or
Sequence 4.
Two sequences: Sequence 1 and 4.
Seq. 1
Seq. 4
Setpoint
low
Function diagram
The "Setpoint low" (heating setpoint) is assigned to sequence 1.
Its output signal acts reverse to the load (inputs variable).
Example for heating: Outside temperature
, sequence 1
.
The "Setpoint high" (cooling setpoint) is assigned to sequence 4.
Its output signal acts reverse to the load (input variable).
Example for cooling: Outside temperature
, sequence 4
.
Functions "Heat demand" (see Section 10) and "Refrigeration demand" (see
Section 10.2) process the controller's output signal. The settings are described in
the corresponding chapters.
Note
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Siemens
Switching and monitoring device RMS705B
CE1P3124en
Building Technologies
Universal controller
01.04.2010