7/1/2011 3:07 PM | |
Posts: 35 Rating: (4) |
Situation: S7-300 and 400 PLC with time-of-day synchronization enabledthrough a NTP server. 1) setting local time The NTP server synchronizes to UTC time. Conversion to local time should be done by theNTP clients. Howto do this? - The usual method doesn't work, because the NTP overwrites the time with UTC time at each sync. - I can't define a 7200 000 msec offset in the diagnostics/clock tab. It's too big a number for the field. Am I missing a setting here? 2) daylight saving time (less important problem) I also need daylight saving switching, but according to this FAQ post, that isn't supported out of the box either: How can you calculate the actual local time (summer time or winter time) in the S7-300/400 CPU and then use it on the panel as system time? http://support.automation.siemens.com/WW/view/en/22145528 |
Last edited by: cajac at: 7/1/2011 3:30 PMI noticed something strange: When using a CP module there is a time zone selection field in the ''time-of-day synchronization tab'' of the CP module. But when using the profinet interface of the plc directly - and no CP module - this selection box doesn''t show up in the ''time-of-day synchronization'' tab of the pnio interface. |
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7/1/2011 3:27 PM | |
Joined: 3/21/2006 Last visit: 10/7/2024 Posts: 10229 Rating: (1181)
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Hello, http://support.automation.siemens.com/WW/view/en/22144502Isn't exactly on topic but is possible way for both issues. Best regards, Hristo Mihalev |
7/1/2011 8:00 PM | |
Posts: 1 Rating: (0) |
Thanks for the link! |
3/22/2017 3:19 PM | |
Joined: 2/17/2012 Last visit: 10/15/2024 Posts: 21 Rating: (0) |
Hello cajac, Did you solve your problems? Regards |
3/28/2017 11:52 AM | |
Joined: 9/3/2014 Last visit: 3/13/2019 Posts: 4766 Rating: (122) |
New question published by nunobnk is split to a separate thread with the subject Time synchronization, summer/winter time. Best regards |
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