Quote Originally Posted by joulz View Post
Sorry, didnīt refreshed me screen so i missed your previous post. The clocks are synchronised by NTP. This mechanism works wel and the clock of the PC and the IEDīs are synchronised (accept the summer/wintertime setting).
Thanks for your hint about the synchronisation. We double checked the clock and there was a difference of 1M15. We correct this and our delay is working well.

We appreciate your help very much.