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OB61 in Isochrone Mode

Created by: nimalak at: 11/2/2010 4:06 PM (2 Replies)

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11/2/2010 4:06 PM	Rate (0)
nimalak Posts: 21 Rating: (0)	Hello members I read manual about Isochrone Mode from on line help https://support.automation.siemens.com/WW/llisapi.dll?func=cslib.csinfo&lang=en&objid=15218045&caller=view how can I find example to check OB61 in the program and bus setting. Is it used to make I/O available in a constant times?
nimalak Posts: 21 Rating: (0)
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11/4/2010 12:05 PM	Rate (0)
jacek d Platinum Member Joined: 9/23/2005 Last visit: 6/9/2023 Posts: 4181 Rating: (645)	Not exactly. It's used to synchronize user program with bus running isochronous (clocked)mode. Which means, that OB61 interrupt start event is fired each time the data exchange is finished on a master system the OB is synchronized to.
	Regards, Jacek What is confusing you is the fact that you never see a number but always its digit representation. So you end up thinking that the number is the representation. - Andrej Bauer Any claims against me - based on whatever legal reason - resulting from the use of any code and/or ideas presented on this forum shall be excluded. #StayWithUkraine
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This contribution was helpful to 1 thankful Users nimalak

11/4/2010 1:00 PM	Rate (1)
hdhosseini Diamond Member Joined: 1/28/2009 Last visit: 6/9/2023 Posts: 6806 Rating: (1346)	Dear nimalak check tha attachment for sample example of OB61.The program is based on IPO model (read input-process and write outputs).Check this manual for more information(section 2.5 2.5 Programming the clocked portion of the program ). Also refer to this book, page 307 for brief description about the topic and figure 20.14 for detailed explanation. Attachment OB61.zip (630 Downloads)
	Demo Channel on Youtube
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This contribution was helpful to 3 thankful Users nimalak zbyni Quentin44

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