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Siemens
RWD Primary Controls Modbus Interface
CB1P3099en_01
Building Technologies
Table of Contents
27.10.2009
Table of Contents
1
About This Document ................................................................................. 4
1.1
Before Starting............................................................................................... 4
1.2
Additional Documents.................................................................................... 4
1.3
Abbreviations & Terminologies ...................................................................... 5
1.4
Important Notes ............................................................................................. 5
2
Product Overview ........................................................................................ 6
3
Commissioning SEZ50MB .......................................................................... 8
4
Modbus Operation ..................................................................................... 10
5
RWD Parameters & Addresses................................................................. 14
6
Appendix A:Standard IEEE-754 Format................................................... 23
6.1.1
General Description ..................................................................................... 23
6.1.2
Data Formats ............................................................................................... 23
7
Appendix B: Generating A CRC16 Check Sum....................................... 24
8
Trouble Shooting Hints ............................................................................. 26