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Siemens Building Technologies Basic Documentation RVA47.320 CE1P2379E
HVAC Products Description of the heating engineer settings 15.07.2002
4.4 Displaying the PPS communication
• Interface for BMUs and digital room unit
• Checking the communication with the peripheral devices (BMUs, room unit)
PPS is a point-to-point interface for communication between controller, BMU and room
unit. The display provides information about the communication status and the types of
connected peripheral devices.
1. Press the operating line selection buttons to select operating line 54.
2. Press the + / - buttons to interrogate the various PPS users.
Display Unit
– – –
1...12 / 0...255
o o o
No communication
PPS address / identification code
Short-circuit of communication line
The status of the PPS communication will automatically be displayed on this line. If
communication is error-free, the controller identifies the unit connected by displaying
the identification number, in addition to the device address.
The display is comprised of PPS address and a device identification code.
Within the PPS, a fixed PPS address is assigned to some types of devices:
Room unit
1
BMU-Nummer 1
4
BMU-Nummer 2
5
BMU-Nummer 3
6
BMU-Nummer 4
7
These peripheral devices can only be operated under the respective PPS address. If
one of these devices is not used, the PPS address can be allocated to some other
peripheral device.
Assignment of all the other peripheral devices to the PPS addresses can be made
randomly.
Since every controller has a specific and confined PPS address space, the same PPS
addresses can be assigned to each device.
Benefit
Description
Setting
Effect
Displays
PPS-address
Note
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