Table of contents
4.3
5
Modbus TCP ......................................................................................................................................... 35
5.1
General ............................................................................................................................. 35
5.2
Addressing ........................................................................................................................ 35
5.3
5.3.1
Function codes .................................................................................................................. 36
5.3.2
5.3.2.1
5.3.2.2
Writing parameters ............................................................................................................ 36
5.3.2.3
Writing commands ............................................................................................................ 37
5.4
Transactions ...................................................................................................................... 38
5.5
MODBUS error codes ......................................................................................................... 38
5.6
Invalid values ..................................................................................................................... 39
5.7
5.8
Modbus TCP whitelist ......................................................................................................... 39
5.9
5.10
System time with SNTP ...................................................................................................... 43
5.10.1
Requirement ...................................................................................................................... 43
5.10.2
Settings ............................................................................................................................. 44
5.10.3
Data points ........................................................................................................................ 45
5.10.4
Parameters ........................................................................................................................ 46
6
PROFINET IO ......................................................................................................................................... 47
6.1
General ............................................................................................................................. 47
6.2
6.3
6.3.1
Metering values ................................................................................................................. 49
6.3.2
Cyclic data traffic ............................................................................................................... 51
6.3.3
Acyclic data traffic ............................................................................................................. 62
6.4
6.4.1
General ............................................................................................................................. 66
6.4.2
6.4.3
6.4.4
Process alarm messages ..................................................................................................... 74
7
Disposal ............................................................................................................................................... 75
A
ESD guidelines ..................................................................................................................................... 77
A.1
B
List of abbreviations ............................................................................................................................ 79
B.1
Table of abbreviations ........................................................................................................ 79
4
3WA Air Circuit Breaker Communication
System Manual, 11/2021, 92310000004-02