10.1.3 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 > Heat demand >
Configuration
Operating lin
e Adjustab
le values / Comment
Primary controller Yes, No
As a primary controller, it provides the acquired demand signals from the heat
distribution zone as well as the internal demand signals from RMS705B to "Heat
distr zone source side", where they are passed on to generation or another primary
controller.
Heat demand in °C is made up of the current setpoint of the control loop and a
temperature boost. The temperature boost helps compensate line losses.
Main menu > Commissioning > Communication > Distribution zones >
Setting values
Operating line Range Factory setting
Heat distribution zone 1…31 1
Heat distr zone source side ----, 1…31 ----
Heat demand setpoint increase 0…50 K 0 K
10.1.4 Demand signals from the bus
RMS705B receives the following demand signals via bus from the respective heat
distribution zone:
Demand 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 "Heat demand air handling";
e.g. for air ha
ndling unit with air heatin
g coil.
Heat demand in %
from room control with RXB, RXL, RDF, RDG as "Heat demand air retreatment";
e.g. heating register.
Heat demand in %
from room control with RXB, RXL, RDF, RDG as "Heat demand heating
surface"; e.g. floor heating.
Temperature request in °C
from a RMH760 controller or RMU basic type C as "Heat demand" in °C;
e.g. from a heating circuit controller or cascaded primary controller.
All of these signals are handled simultaneously.
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Siemens Switching and monitoring device RMS705B CE1P3124en
Building Technologies H/C demand, H/C changeover 01.04.2010
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