Basic Documentation

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Siemens Universal controllers RMU710B, RMU720B, RMU730B CE1P3150en
Building Technologies Sequence controller 03.10.2011
15 Sequence controller
15.1 Sequence controller structure
The sequence controller is activated by assigning a main controlled variable. See
sections 11, 12, 0 and 14 for the associated settings.
Con
troller 1
Controller 1 can contain max 5 sequences in the following combinations:
 One sequence: Sequence 1 or sequence 4
 Two sequences: Sequence 1+2, or sequence 1+4, or sequence 4+5
 Three sequences: Sequence 1+2+3, or sequence 1+2+4, or sequence 1+4+5
 Four sequences: Sequence 1+2+3+4, or sequence 1+2+4+5
 5 sequences: Sequence 1+2+3+4+5
SpH SpC
3140D33en
Heating Cooling
Manipulated variable
Load
Seq 3
Seq 2 Seq 1 Seq 5
Seq 4
The heating setpoint is assigned to the combined sequences 1, 2 and 3. Their
output signal acts reversed to the load (input variable), e.g. heating.
The cooling setpoint is assigned to the combined sequences 4 and 5. Their output
signal acts directly to the load (input variable), e.g. cooling.
Controllers 2+3
Controllers 2+3 can contain max 3 sequences in the following combinations:
 One sequence: Sequence 1 or sequence 4
 Two sequences: Sequence 1+2, or sequence 1+4
 Three sequences: Sequence 1+2+4
SpH SpC
3140D34en
Heating Cooling
Manipulated variable
Load
Seq 2 Seq 1
Seq 4
The heating setpoint is assigned to the combined sequences 1 and 2. Their output
signal acts reversed to the load (input variable), e.g. heating.
The cooling setpoint is assigned to sequence 4. Its output signal acts directly to the
load (input variable), e.g. cooling.
15.1.1 Assign aggregates to sequences
Each sequence can be assigned:
 1 load output
 1 pump output
The functions "Heat demand" (see section 25) and "Refrigeration demand" (see
se
ction 26) also process the output signal of the sequ
ence controller. The relevant
settings are described with these functions.
Function diagram
Function diagram
Note