Description
2.8 Communication and system connection
3WA1 air circuit breaker
156 Equipment Manual, 02/2023, 92310000002-06
Operator controls
The COM190 and COM150 communications modules have the following operator
controls:
• Function button S1
• Slide switch for parameter write protection
• Slide switch for module role selector switch
Function button S1
The function button S1 is used to reset the communications module to the factory
settings. For more information on the mode of operation, see Chapter Resetting to
factory settings (Page 167).
Slide switch for parameter write protection
The slide switch for parameter write protection prevents the circuit breaker parameters
from being modified via the Ethernet or Modbus RTU interface for the Modbus TCP and
PROFINET IO (COM190) or Modbus RTU (COM150) communication protocols. The
parameter write protection is activated at the factory and is only valid for this
communications module. For a second communications module, parameter write
protection must be set separately.
Parameter write protection has no effect on the local communications interfaces USB
and Bluetooth. For more information on the mode of operation, see Chapter Resetting to
factory settings (Page 167).
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