Siemens Synco 700 RMZ785 Basic Documentation page 82

Start conditions with switching
command outputs
(Example 2.2)
Configuration
Siemens
Building Technologies
Load input,
Number of
start condition
stages or
aggregates
A+B+C+D
Description:
- 4 evaporator pumps available for 3 single-stage refrigeration machines.
- Max. 3 pumps are operating at the same time (1 standby).
- An evaporator pump is switched on each time a refrigeration machine is released.
- The run priority of the pumps changes periodically between the 4 pumps (first in, first Out). - The next
pump is switched on in the event of a fault (fault changeover).
- The function diagram shows a snapshot: Sequence ABC in operation; A takes priority; D in standby.
Plant diagram
Evp
1
DI
AI
DO
AO
Configuration diagram *
* The start conditions of the rotary step switch are configured as per the refrigeration machine
releases.
Main menu > Commissioning > Extra configuration > Aggregates > Rotary step switch >
Rotary step switch 1...2 >
Operating line
Type
Switching and monitoring device RMS705B
Aggregates
Output configuration
A B
1 4
Start
x d d
T
3
2
1 1
2 2
3 3
4
4
4x 4x
Rotary
step switch 1
X
Setting
Linear
Run priority
C D
changeover
d d
Function diagram
C
B
A
100 %
0 %
X
P
C D
C D
C
CE1P3124en
Yes
Q
D
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01.04.2010