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OB 36,37 and 38 ?

Created by: melsec- at: 1/24/2011 5:38 AM (2 Replies)

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1/24/2011 5:38 AM	Rate (0)
melsec- Experienced Member Joined: 6/14/2008 Last visit: 1/25/2022 Posts: 65 Rating: (3)	I am worrying about the program of SIMATIC-S5. OB 36, 37, and 38 are in a program. A description does not have the explanation about these OB. What treatment are "OB 36, 37, and 38"? Moreover, in this program, OB1 is calling OB 36, 37, and 38. The form of CPU is 6ES5944-7UB21. P r o g r a m o v e r v i e w w i t h o u t D B +-OB 1-+=FB 1- I I +=OB 37- I +=OB 38-+=PB 15- I I I +=PB 2- I I +=OB 36-+=PB102-+-FB 73- I I I +=PB102-+-FB 73- I I I +=PB100-+-FB 73- I I I I I +-FB 73- I I I I I +-FB 73- I I I +=PB100-+-FB 73- I I +-FB 73- I +-FB 73- +-OB 21-+-PB221-+-FB203- OB21:Manualswich on I I I +-FB203- I +=PB219-+=FB203- I I I +-FB225- I I I +=FB230- I +-FB 25- +-OB 22-+-PB221-+-FB203- OB22:Automatic swich on when power is restoed I I I +-FB203- I +=PB219-+=FB203- I I I +-FB225- I I I +=FB230- I +-FB 25- +-OB 34- OB34:Battery failure +-OB 36-+=PB102-+-FB 73- OB36:??? I +=PB102-+-FB 73- I +=PB100-+-FB 73- I I I +-FB 73- I I I +-FB 73- I +=PB100-+-FB 73- I +-FB 73- I +-FB 73- +-OB 37- OB37:??? +-OB 38-+=PB 15- OB38:??? I +=PB 2- I ask for the advice from you. Thank you

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1/24/2011 6:59 AM	Rate (0)
fritz Diamond Expert Joined: 10/7/2005 Last visit: 5/29/2023 Posts: 2965 Rating: (1025)	Hello melsec- OB 36, 37& 38 do certainly NOT exist assystem related OB's in a CPU 944 and as such 9and asyou said) can't be found in the manual. I wonder though if someone simply used and programmed them like you would use and program a PB. I must admit that I never tried this in the good old S5 days, but Step5 certainly won't stop you from doing so. Perhaps worthwhile testing if this works should you have a 944 CPU handy (others may be able to verify this too). If it does,you treat these OB's like you treat a PB. I hope this helps and please let us know what you find out.
	Cheers fritz The advice and opinion given in this thread is that of the author and does not necessarily reflect the views of I S Systems Pty Limited. To find out how I S Systems can help you with your automation needs please visit www.issystems.com.au.
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1/24/2011 7:40 AM	Rate (0)
melsec- Experienced Member Joined: 6/14/2008 Last visit: 1/25/2022 Posts: 65 Rating: (3)	Mr. fritz Thank you for a reply. instantly The following programs were created to the trial. OB1 L IW30 T QW30 A I 31.0 JC OB 36 A I31.1 JC OB 37 A I31.2 JC OB 38 L QW 0 L QW 10 L QW 40 BE OB36 L IW 0 L QW 0 BE OB37 L IW 10 T QW 10 BE OB38 L IW 40 T QW 40 BE This program was written in 6ES5944-7UA21 which I have. Then, it moved like PB. When I31.0 is inputted, OB36 is. When I31.1 is inputted, OB37 is. When I31.2 is inputted, OB38 is. It checked becoming effective, respectively.

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