Siemens RXB Series Basic Documentation page 71

Zone addressing
Set room control
combination
Application example 2
Note
Zone addressing
Slave ventilation
controller settings
For internal use only
Siemens
Building Technologies
QAW740
Room unit
Geogr zone: 1
Room control combination
Room control combination
Room control combination
Room control combinations featuring multiple ventilation controllers
When a space is controlled by several ventilation controllers, e.g. two RMU7x0B
controllers (they must be RMU7x0B controllers) controlling the temperature in a
warehouse, the controllers can exchange information such as room temperature,
operating mode, and setpoint over the KNX bus.
With this room control combination, one ventilation controller must be set as the
master and all the others as slaves.
QAW740
Room unit
Geogr zone = 2
Within the room control combination, the slave ventilation controller operates with
the same operating mode as the master.
The slave controllers can use either the same setpoints as the master, or individual
setpoints.
KNX bus communications
Appendix
RMH...
Operating mode
Heating circuit 1, master
Geogr zone: 1
Master
Transmits room setpoint and operating mode.
Slave, external setpoint
Receives room setpoint and operating mode.
Slave, internal setpoint
Retains its own room setpoint as valid, but adopts the
operating mode from the master.
RMU...
Room operating mode
Ventilation 1
Geogr zone = 2
Room control comb. =
Master
RMH...
Operating mode
Heating circuit 2, slave
Geogr zone: 1
RMU...
Room operating mode
Ventilation 2
Geogr zone = 2
Room control comb. =
Slave ext. setpoints
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CE1P3127en
2013-04-08