Siemens SENTRON 3WA System Manual page 44

Modbus TCP
5.8 Modbus TCP whitelist
Parameterization
The Modbus TCP whitelist is deactivated on delivery and can be activated and parameterized
using the SENTRON powerconfig configuration software (from version 3.17 or version 2.5 as
an app).
Parameterization can be performed via the USB or Bluetooth interface of the 3WA circuit
breaker or via the Modbus TCP interface of the COM190 communication module. During
parameterization via the Modbus TCP interface of the COM190, the parameter write
protection (DIP switches) of the connected COM190 must be deactivated.
You can find information on parameter write protection in the Equipment Manual; see
Chapter Reference documents (Page 5).
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3WA Air Circuit Breaker Communication
System Manual, 11/2021, 92310000004-02