User Manual

10.2.3 Use universal controller as primary controller
Enter an extra configuration to use a universal controller as primary controller (see
Section 10.3 for application examples).
Purpos
e
Contrl.
X
Main menu > Commissioning > Extra configuration > Aggregates > Refrigeration demand >
Config
uration
Operating lin
e Adjustable values / Comment
Primary controller Yes, No
As a primary controller, it provides the acquired demand signals from the
refrigeration distribution zone as well as the internal demand signals from
RMS705B to "Refrig distr zone source side", where they are passed on to
generation or another primary controller.
Refrigeration demand in °C is made up of the current setpoint of the control loop
and a temperature reduction. The reduction helps compensate line losses.
Main menu > Commissioning > Communication > Distribution zones >
Setting values
Operating line Range Factory setting
Refrigeration distribution zone 1…31 1
Refrig distr zone source side ----, 1…31 ----
Refrig demand setp reduction 0…50 °C 0 K
10.2.4 Demand signals from the bus
RMS705B receives the following demand signals via bus from the respective
refrigeration distribution zone:
Dema
nd signals

Valve position in %
from a control with RMU7... as basic type A or U or from other RMS-internal
controllers 1...3 (see Section 10.1.2) as "Refrig demand air handling";
e.g. for air ha
ndling unit with air cooling coil.
 Refrigeration demand in %
from room control with RXB, RXL, RDF, RDG as "Refrig demand air
retreatment"; e.g. cooling register.
 Refrigeration demand in %
from room control with RXB, RXL, RDF, RDG as "Refrig demand cooling
surface"; e.g. chilled ceiling.
 Temperature request in °C
from a RMH760 controller or RMU basic type C as "Refrigeration demand" in °C;
e.g. from a primary controller of a chilled water plant.
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Siemens Switching and monitoring device RMS705B CE1P3124en
Building Technologies H/C demand, H/C changeover 01.04.2010