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daylight savig time

3/27/2023 8:40 AM	Rate (0)
Jazkarraga Posts: 16 Rating: (0)	Hello I have tried to program my PLC 1212C to make the time change in summer and winter. For this I have activated the PLC property daylight saving time. But it didn't work Any idea why it didn't work or how to do it? Thank you very much
Jazkarraga Posts: 16 Rating: (0)
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3/27/2023 8:50 AM	Rate (0)
Stefan Arcularius Platinum Member Joined: 1/21/2013 Last visit: 12/30/2025 Posts: 4371 Rating: (650)	Hi Jazkarraga, Here are some points where you may have made some mistakes: If you change some hardware-related settings, such as daylight saving time, you must download the hardware, which requires a PLC stop. Most of the time, if you just press the download button, only software changes are downloaded. Daylight saving time only adjusts the local time, not the system time. So make sure you are looking at local time. Kind regards Stefan

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This contribution was helpful to 1 thankful Users Jazkarraga

3/27/2023 9:07 AM	Rate (0)
Jazkarraga Posts: 16 Rating: (0)	Hello I was working with the system time, I saw that it was two hours delayed today. The local time was fine Thank you very much for your reply
Jazkarraga Posts: 16 Rating: (0)
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3/27/2023 9:08 AM	Rate (0)
qwazee Platinum Expert Joined: 3/30/2020 Last visit: 12/11/2025 Posts: 5656 Rating: (1082)	Consider using the code block that is provided by Siemens.. LINK: Library of General Functions See the documentation of the relevant block (LGF_SetTime) attached as a PDF. Attachment Extract-LGF_SetTime.pdf (393 Downloads)
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