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REAL TIME CLOCK

Created by: qayyum faiz at: 10/18/2012 9:37 AM (7 Replies)

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10/18/2012 9:37 AM	Rate (0)
qayyum faiz Experienced Member Joined: 7/30/2012 Last visit: 5/7/2024 Posts: 127 Rating: (0)	Dear All, do we have real time clock option in S7-1200?? if yes then how can one use it?? is it some type of extra module or do we have to use RTC as a blok in Programming because in other PLC's like one of Schneider we use a Real time block sepeately which is batery powered. waiting for replies.

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10/18/2012 12:50 PM	Rate (6)
smiffy Platinum Member Joined: 1/17/2007 Last visit: 10/21/2024 Posts: 1547 Rating: (537)	The S7-1200 CPU's also have a battery (actually a maintenence free Super Capacitor) powered real time clock (with a typical retention time of 20 days, and a minimum retention time of 12 days). The time can be read with 2 functions:- 1) RD_SYS_T which reads the system time (this is UTC) with no offset for timezone or daylight savings time 2) RD_LOC_T which reads the current time zone time adjusted for daylight savings time. See the attached page from the manual. Attachment S7-1200 Time Functions.jpg (3731 Downloads)
	Programming today is the race between software engineers building bigger and better idiot proof programs, and the universe producing bigger and better idiots. So far, the universe is winning...
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This contribution was helpful to 1 thankful Users NRS94

10/18/2012 1:51 PM	Rate (4)
Denilson Pegaia Platinum Expert Joined: 9/23/2005 Last visit: 11/14/2024 Posts: 4352 Rating: (1452)	Hi, the s7-1200 has a internal real time clock. you can access it by using of instructions WR_SYS_T, RD_SYS_Tand RS_LOC_T
	Denilson Pegaia Siemens Industry Sector Technical Support
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10/18/2012 2:11 PM	Rate (0)
qayyum faiz Experienced Member Joined: 7/30/2012 Last visit: 5/7/2024 Posts: 127 Rating: (0)	thank you so much sir the info you provided helped me a lot

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10/18/2012 2:23 PM	Rate (0)
qayyum faiz Experienced Member Joined: 7/30/2012 Last visit: 5/7/2024 Posts: 127 Rating: (0)	thank you so much sir the info you provided helped me a lo

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10/29/2012 7:13 AM	Rate (0)
poojad Posts: 35 Rating: (1)	hello sir, Thanx for information u provided it was very helpfull.....but can u provide a sample example how to use a RTC in a program that would be very helpfull for me..... thanx & regards.....
poojad Posts: 35 Rating: (1)
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10/29/2012 7:50 AM	Rate (0)
leszkoo Experienced Member Joined: 9/13/2010 Last visit: 11/6/2024 Posts: 30 Rating: (1)	This will be helpfull: http://support.automation.siemens.com/WW/view/en/39182145
	Last edited by: O_Moderator at: 10/29/2012 7:59 AM Last edited by: leszkoo at: 10/29/2012 7:52 AM
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1/5/2015 9:55 AM	Rate (1)
Dwayne Chou Posts: 21 Rating: (2)	This is the tutorial for S7-1200 Realtime functions: https://www.youtube.com/watch?v=jY117f6YryU Hope it can help!
Dwayne Chou Posts: 21 Rating: (2)
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