Siemens SENTRON 3WA - Page 58

PROFINET IO
6.3 Metering values, addressing und data traffic
3WA Air Circuit Breaker Communication
56 System Manual, 11/2021, 92310000004-02
Control bytes
The control bytes for controlling the circuit breaker are always two bytes long. With these
control bytes, you can:
• Open/close the circuit breaker
• Acknowledge tripping events
Setting the outputs is edge-triggered. It suffices to set the corresponding bits for 0.5 s. After
this, these control bits must be reset to avoid subsequently triggering any undesired actions.
The table below contains a description of the control bytes:
Byte
Bit
Value
3WA circuit breaker
n
0 / 1
0 … 3
Commands to close/open the circuit breaker
0
Not defined (no action)
1
Circuit breaker open (opening of main contacts)
2
Circuit breaker closed (closing of main contacts)
3
Not defined (no action)
2
–
Acknowledge and reset currently active trip indication
3
–
Not used
4
–
Not used
5
–
Not used
6
–
Not used
7
–
Not used
n + 1
0
–
Not used
1
–
Not used
2
–
Not used
3
–
Reset all minimum/maximum value logs (except temperature)
4
–
Reset minimum/maximum logs for temperatures
5
–
Not used
6
–
Not used
7
–
Not used