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Siemens Switzerland Ltd
User manual RVS61.843 CE1U2355en_02
HVAC Products 6 The settings in detail 23. November 2007
The bus power supply enables the bus system to be powered directly by the individual
controllers (no central bus power supply). The type of bus power supply can be
selected.
• Off: No bus power supply via the controller
• Automatically: The bus power supply (LPB) via the controller is automatically
switched on and off depending on the requirements of the LPB
The display shows whether the controller currently supplies power to the bus:
• Off: Bus power supply via the controller is currently inactive
• On: The bus power supply via controller is currently active. At the moment, the
controller supplies some of the power required by the bus
Central functions
Line no. Operating line
6620 Action changeover functions
Segment
System
6621 Summer changeover
Locally
Centrally
6623 Optg mode changeover
Locally
Centrally
6625 DHW assignment
Local HCs
All heating circuits in the segment:
All HCs in system
6627 Refrigeration request
Locally
Centrally
6630 Cascade master
Always
Automatic
These settings are only relevant for device address 1.
The range of action of central changeover can be defined.
This concerns:
• Changeover of operating mode via input H (when selecting “Centrally“ on operating
line 6623)
• Summer changeover (when selecting ”Central“ on operating line 6621)
The possible settings are the following:
• Segment: Changeover takes place with all controllers in the same segment
• System: With all controllers, changeover takes place in the entire system (in all
segments). For that, the controller must be located in segment 0!
The range of action of summer changeover is as follows:
• Local entry:
Local action; the local heating circuit is switched on the basis of operating lines 730,
1030 and 1330
• Central entry: Central action; depending on the setting made on operating line
“Action changeover functions“, either the heating circuits in the segment or those in
the entire system are switched on the basis of operating line 730
The range of action of operating mode changeover via input H is as follows:
Bus power supply function
Bus power supply state
ction changeover
functions
Summer changeover
Optg mode changeover
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