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Siemens Building Technologies
Basic Documentation RVP540 / RVP550
CE1P2488en
HVAC Products
Description of the heating engineer settings
18.10.2002
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a)
c)
b)
a) The framed number indicates the selected setting line
b) Displayed value of the temperature measured
c) The number indicates the selected test step
– – –
Sensor with open-circuit or no sensor connected
0 0 0
Sensor with short-circuit
4.51 Display of 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.
Press the + / - buttons to interrogate the various PPS users. If communication is error-
free, the controller identifies the unit connected by displaying the identification number,
in addition to the device address.
Display
Unit
– – –
1...12 / 0...255
o o o
No communication
PPS address / identification code
Short-circuit of communication line
The display is comprised of a PPS address and a device identification code, e.g. 4.102
for a BMU (102) at PPS address 4.
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Within the PPS, a fixed PPS address is assigned to some types of devices:
Type of unit
Assignment
PPS-address
Room unit
1
BMU
4
Display
Special displays
Benefit
Description
Setting
Displays
PPS-address
