4/29/2023 6:42 PM | |
Joined: 4/9/2009 Last visit: 1/30/2025 Posts: 68 Rating:
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Hi, I also use the NTP library for making PLC as NTP Server. But I noted that if I configure the panel as NTP Client by specifying a certain frequency it seems that this is ignored. It seems that the sync happens every 3/4 minutes. What the problem in our opinion? ------------------------------------------------------------------------------------------ |
Last edited by: Jen_Moderator at: 05/02/2023 06:08:32New subject after splitting |
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4/30/2023 9:01 AM | |
Joined: 1/21/2013 Last visit: 2/12/2025 Posts: 3537 Rating:
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Hi roberto.zeni, There are two things to be aware of. The first has to do with the update rate configuration. Although values from 10 to 86400 seconds are allowed, the value is rounded to the nearest power of two starting with 16 seconds. The other has to do with the way the ntp client works. When time synchronization is started once, the allowed time difference is 128ms (by default). Therefore you can't change the system time on the NTP server, in your case your PLC, without getting a synchronization error. However, if the synchronization error persists, it will take several minutes before the synchronization is restarted. See "Don't Change The System Time While 'ntpd' Is Running" for details. Kind regards |
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