PROFINET IO
6.3 Metering values, addressing und data traffic
3WA Air Circuit Breaker Communication
62 System Manual, 11/2021, 92310000004-02
6.3.3 Acyclic data traffic
In addition to cyclic data traffic, acyclic data can be transferred, e.g.
• Parameters
• Diagnostic information
• Commands
Data transfer takes place in parallel with cyclic data traffic.
You can use acyclic data traffic by means of the following methods:
• SIMATIC S7 CPUs contain system function blocks (e.g. RDREC, WRREC, ...). With these, the
CPUs can read and write the data sets individually, and read the alarm messages.
• Any PROFINET supervisor can read and write data sets.
• Any other PROFINET controller can read and write data sets.
Definition of data sets
You can find a description of the data sets under Modbus register for the 3WA air circuit
breaker (https://support.industry.siemens.com/cs/ww/en/view/109794278
).
In addition to the existing data sets, the I&M0 to I&M4 data sets for identification and
maintenance of the circuit breakers/modules according to the PROFINET standard were
implemented.
I&M device identification
These data sets contain the I&M information according to the PROFINET standard
IEC 61158-6-10 and are used for unique identification of a 3WA circuit breaker.
Addressing the I&M data sets
Reading the I&M0 data set
For the 3WA air circuit breaker
• Slot number 1
• Subslot 1
For the COM190 communication module Slot "0":
• Slot number 0
• Subslot 1, 0x8000, 0x8001 and 0x8002
Reading of data sets I&M1 to I&M4 is possible via both slots.
Writing of data sets I&M1 to I&M4 is only permitted via slot 0 subslot 1.
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