User Manual

Load assignment (flexible step switch only)
With the flexible step switch, assign the load to the aggregates so that as few
aggregates as possible are operating and optimum control is achieved under
partial load conditions.
To this end, the output values of each connected aggregate must be set in the
rotary step switch.
The mini. output (0% of the load signal) and output (100% of the load signal) must
be set if the load output configuration is (
).
The rotary step switch then distributes the load on the aggregates.
Set and connect the aggregates as follows:
Output Aggregate A ≤ Aggregate B ≤ Aggregate C ≤ Aggregate D
As shown in the examples below, the ratio of the loads determines the actual
output in the RMS705B. Sometimes however, it is easier for the commissioning
engineer, to set effective output.
Main menu > Commissioning > Settings > .... or
Main menu > Settings > Aggregates > Rotary step switch > Rotary step switch 1…2 >
Operating line Range Factory setting
Min output A 0.0…999.9 0.0
Output A 0.1…999.9 1.0
Min output B 0.0…999.9 0.0
Output B 0.1…999.9 1.0
Min output C 0.0…999.9 0.0
Output C 0.1…999.9 1.0
Min output D 0.0…999.9 0.0
Output D 0.1…999.9 1.0
Output Aggregate A = 50 kW, Aggregate B = 100 kW
Setting example 1
 Expressed in kW:
Operating line Setting
Output A 50.0
Output B 100.0
 or as ratio:
Operating line Setting
Output A 1.0
Output B 2.0
Output Aggregate A = 5 kW, Aggregate B = 5 kW Setting example 2
 Expressed in kW:
Operating line Setting
Output A 5.0
Output B 5.0
 or as ratio:
Operating line Setting
Output A 1.0
Output B 1.0
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Siemens Switching and monitoring device RMS705B CE1P3124en
Building Technologies Aggregates 01.04.2010