Siemens SENTRON 3WA - 5.9 Configurable Modbus TCP port; 5.10 System time with SNTP

Modbus TCP
5.9 Configurable Modbus TCP port
3WA Air Circuit Breaker Communication
System Manual, 11/2021, 92310000004-02
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5.9 Configurable Modbus TCP port
It may be necessary to change the number of the TCP port due to applications or to ensure
cybersecurity. The TCP port number for Modbus TCP connections can be configured with the
SENTRON powerconfig configuration software or as a data point. The default value 502 can
be changed accordingly.
Note
Changing the default port can make it difficult to find a 3WA circuit breaker in t
he network
using the default search algorithm (e.g. in the SENTRON powerconfig configuration
software).
5.10 System time with SNTP
5.10.1 Requirement
The Simple Network Time Protocol (SNTP) can be used to set the system time of the 3WA
circuit breaker. SNTP is a simplified version of NTP and automatically sets the system time
with the help of NTP servers (time servers).