Modbus TCP
5.10 System time with SNTP
3WA Air Circuit Breaker Communication
44 System Manual, 11/2021, 92310000004-02
Requirement
• COM190 communication module
• NTP time server
• SENTRON powerconfig configuration software, version 3.17 or higher, for commissioning
(optional)
To activate the SNTP function and enable writing of parameters via the Ethernet connection,
the remote parameterization protection (DIP switches) of the COM190 communication
module must be deactivated. You can find information on remote parameterization
protection in the Equipment Manual; see Chapter Reference documents (Page 5).
If two COM190 communication modules are operated simultaneously on the 3WA circuit
breaker, the system time update via SNTP can take place either via the communication
module with role A or the communication module with role B.
According to the Siemens Cyber Security Disclaimer, the COM190 communication module
must not be operated in public networks. The SNTP function of the COM190 is therefore
designed for a local NTP time server in closed networks.
5.10.2 Settings
The Simple Network Time Protocol (SNTP) function uses the following setting for the 3WA
circuit breaker:
• NTP server address: IPv4 address of NTP server
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