How to realize time synchronization on IG502 with private network?

How to realize time synchronization on IG502 with private network?

IG502 time synchronization is realized through NTP. The default NTP server address is the public network address.

If it is a private network, it is impossible to access the default NTP server address. So you need to build a private NTP server, after NTP synchronization is successful, the system time will be written to the RTC.