hotwires Posted February 21, 2017 Report Share Posted February 21, 2017 What are the "UTC to Date Time" and "Date Time to UTC" function blocks for? Could not locate reference in the textual help. I know RTC= Real time Clock and guess UTC is universal coordinated time? What sparked this question is that I was wanting to have a data tag that would show the date in MM/DD/YYYY for display in an HMI element to use as a "counter reset last on date mm/dd/yyyy" . The RTC date stuct parses out the elements of the date as a whole, so I'm guessing I would have to piece it together with logical functions? Just wondered if there was an easier way (I'm always looking for those). Thanks -hw Quote Link to comment Share on other sites More sharing options...
Saragani Posted February 21, 2017 Report Share Posted February 21, 2017 UTC to Date Time takes a UTC number (Unix time) which is the number of seconds since 1900 (in this case), and outputs 2 tags, an RTC Date, and an RTC Time structs, which contains the converted time and time for the given input. Date Time to RTC does the opposite. (For example, the input #3695610531 would result Date: 9/2/2017, and time 06:28:51 1 Quote Link to comment Share on other sites More sharing options...
hotwires Posted February 21, 2017 Author Report Share Posted February 21, 2017 5 minutes ago, Saragani said: UTC to Date Time takes a UTC number (Unix time) which is the number of seconds since 1900 (in this case), and outputs 2 tags, an RTC Date, and an RTC Time structs, which contains the converted time and time for the given input. Date Time to RTC does the opposite. (For example, the input #3695610531 would result Date: 9/2/2017, and time 06:28:51 OK, wow. Would never have guessed that. Not relevant to any applications of mine. We will reach a time when the UTC will exceed the number 32 bits can express. I'm not going to calculate when that will be, to late at night for that. Made me think of the IPv4 to IPv6 scheme. Thanks for the swift and concise reply. Quote Link to comment Share on other sites More sharing options...
Saragani Posted February 21, 2017 Report Share Posted February 21, 2017 Yes, UTC has that limitation. The UTC from 1900 will "expire" in 2038. The one since 1970 will expire about 70 years later. https://en.wikipedia.org/wiki/Year_2038_problem 2 Quote Link to comment Share on other sites More sharing options...
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