Siemens SENTRON 3WA - 2 System description; 2.1 The 3 WA air circuit breaker; 2.2 The CubicleBUS² bus system

Table of contents
3WA Air Circuit Breaker Communication
4 System Manual, 11/2021, 92310000004-02
4.3 Parameterization of ground-fault protection (GF) ............................................................... 34
5 Modbus TCP ......................................................................................................................................... 35
5.1 General ............................................................................................................................. 35
5.2 Addressing ........................................................................................................................ 35
5.3 Function codes, metering values and parameters ............................................................... 36
5.3.1 Function codes .................................................................................................................. 36
5.3.2 Metering values, parameters and commands ..................................................................... 36
5.3.2.1 Reading metering values and parameters ........................................................................... 36
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 Difference between Modbus register number and register address ..................................... 39
5.8 Modbus TCP whitelist ......................................................................................................... 39
5.9 Configurable Modbus TCP port ........................................................................................... 43
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 Technical specifications of the communication interfaces ................................................... 48
6.3 Metering values, addressing und data traffic ...................................................................... 49
6.3.1 Metering values ................................................................................................................. 49
6.3.2 Cyclic data traffic ............................................................................................................... 51
6.3.3 Acyclic data traffic ............................................................................................................. 62
6.4 Interrupt, error and system messages ................................................................................. 66
6.4.1 General ............................................................................................................................. 66
6.4.2 Structure of the diagnostic messages ................................................................................. 66
6.4.3 Diagnostic and maintenance alarm messages ..................................................................... 72
6.4.4 Process alarm messages ..................................................................................................... 74
7 Disposal ............................................................................................................................................... 75
A ESD guidelines ..................................................................................................................................... 77
A.1 Electrostatic sensitive devices (ESD) ................................................................................... 77
B List of abbreviations ............................................................................................................................ 79
B.1 Table of abbreviations ........................................................................................................ 79