Siemens QBM97 Series - 2 Commissioning; 2.1 Modbus Addressing; 2.1.1 DIP Switch Configuration

Commissioning
Addressing
2
12
| 22
Siemens
A6V11478123_en_a
Building Technologies
2019-02-01
2 Commissioning
2.1 Addressing
2.1.1 DIP switches (Climatix and other controllers)
Use DIP switches for adjustment of the Modbus address and for termination.
● The DIP-switches have priority over register 4x0764 (Modbus address).
● The Modbus address (register 4x0764) is valid as soon as all DIP switches are
on '0'.
● Changes of DIP switches are effective after 5 seconds.
Modbus addressing
The DIP switches allow addresses between 1…247 (Modbus specification).
The following example shows Modbus address '3':
Modbus termination
● The termination is done with 120 Ω + 1nF.
● Even if the addressing is done with "On-event addressing (Climatix controllers)
[➙ 13]", the termination has to be done manually.
1 2 3
4 5 6 7 8 9
1
2
1: On
0: Off
128 64 32 16 8 4 2 1
1 2
3 4 5 6 7 8 9
1
2
1: On
0: Off
128 64 32 16 8 4 2 1
1 2 3
4 5
6 7 8 92
1: On
0: Off