User Manual

Output configu
ration
Load input,
start condition
A B C D
Modulating load input with
switching command and
modulating load outputs
Number of
stages or
aggregates
4
1
Start
Run priority
changeover
(Example 3) A+B a d a d a No
Description:
- 2 refrigeration machines with different capacities have an internal output control (e.g. hot gas
bypass) controlled in sequence to a common flow temperature.
- Typical capacity profile: Aggregate A (min. output = 0.5 kW, rated output = 3 kW), Aggregate B (min.
output 1 kW; rated output 6 kW).
- The total output at X
P
= 100 % is 9 kW.
Plant diagram Function diagram (not to dimensions)
AI
DI
AO
DO
T
3123S63
1
2
1
2
0 %
Q
X
P
100 %
A
A
B
+
B
3123D27
Configuration diagram
CD
C D
X
A B
Rotary
step switch 1
Modul. output Modul. output
Main menu > Extra configuration > Aggregates > Rotary step switch > Rotary step switch
1…2 >
Configuration
Operating line Setting
Type Flexible
Main menu > Commissioning > Settings >… or
Main menu > Settings > Aggregates > Rotary step switch > Rotary step switch 1…2 >
Operating line Range Setting
Output A 0.1…999.9 3.0
Min output A 0.0…999.9 0.5
Output B 0.1…999.9 6.0
Min output B 0.0…999.9 1.0
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Siemens Switching and monitoring device RMS705B CE1P3124en
Building Technologies Aggregates 01.04.2010