Hello Hansol,
A couple of points on what you’ve provided here:
- You have your time zone set to GMT/London. If the machine is located in that time zone, you might consider a more local NTP server. Also, your comment about a Korean NTP server makes less sense.
- It looks like you have spaces in your NTP Server names. There should never be a space in a URL. For Korea, your closest NTP servers from ntppool.org are:
0.kr.pool.ntp.org
1.asia.pool.ntp.org
0.asia.pool.ntp.org - Make sure the PLC can reach these NTP servers with correct DNS and Default Gateway. You should see time synchronization notices in the logger, or you can implement the AsIcmp library to try to ping the NTP servers.
-Austin