10.3.3 Consumers
Controller 1 controls a radiator. Heat demand in heat distribution zone 1 is sent to
the bus.
Example
The relevant zone setting for communication is available from the hydraulic
diagram.
Plant Configuration diagram
N.X1
N.Y1
Consumer
N.Y1
N.X1
°C
A
Contrl.
Main menu > Commissioning > Extra configuration > Aggregates > Heat demand >
Config
uration
Operating lin
e Range Setting
Controller 1 ----, Sequence 1 Sequence 1
Main menu > Commissioning > Communication > Distribution zones >
Communication setting
s
Operating line Range Setting
Heat distribution zone 1…31 1
10.3.4 Primary controller
Controller 1 is used to implement precontrol acquiring demand signals from the bus
and routing them to the bus. In addition, controller 1 is used to implement flow
temperature precontrol. In this process, control is started with digital output "d" and
analog output "a" is used to shift the setpoint in dependence of the current heat
demand from the bus.
Example:
The setpoint cannot be directly provided to the controller. This functionality is
covered by the RMU710B, basic type C for a refrigeration primary controller or
by the RMH760 for a heating circuit primary controller.
Notes
Parameterize function block "Motor" with a switch-off delay of e.g. 1 min. to
avoid unnecessary switching of the pump (at very low demand).
Rather than the primary controller shift with analog output of the heat demand
block described here, outside temperature-dependent shift is possible also.
150 / 216
Siemens Switching and monitoring device RMS705B CE1P3124en
Building Technologies H/C demand, H/C changeover 01.04.2010
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