Hardware manual PCD7.LRxx-PG5 room controller │ Document 27-653; version ENG07 │ 2019-03-21
Saia-Burgess Controls AG Communication
5
5-14
Modbus on PCD7.LRxx-P5 RS-485 interfaces
5.4 Modbus on PCD7.LRxx-P5 RS-485 interfaces
Supported Modbus protocol Modbus/RTU
Supported Modbus functionality Modbus client and Modbus server
*
Supported baud rates 1.2 kbps, 2.4 kbps, 4.8 kbps, 9.6 kbps, 19.2 kbps, 38.4 kbps,
57.6 kbps, 115.2 kbps
Supported data formats
(Bits-Parity-Stop)
8-N-1
8-O-1
8-E-1
8-N-2
8-O-2
8-E-2
Supported IRM ports Port 0 and 1
Possible to use at the same time - one port as Modbus client and the other as Modbus server
- both ports as Modbus client
- both ports as Modbus server
Supported Modbus functions
Function Code Description
1 Read Coils
3 Read Multiple Holding Registers
15 Write Multiple Coils
16 Write Multiple Holding Registers
Access with Modbus to
PCD7.LRxx-P5 media
* 7 data bit mode is not supported.
5.4.1 Limitations
Access to other media like timer/counter/DB/text is not possible.
swap, 32-bit holes and active default mapping are NOT implemented.
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