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Inhibiting I/O Scan Delay

8/18/2010 4:19 AM	Rate (0)
Glenn Merrell, CAP Posts: 3 Rating: (1)	Gurus', I have a 95u where the CPU scans the I/O before the I/O cards (6ES5 482-8MA13 and 6ES5 422-8MA11) are fully powered up. This of course triggers various alarms conditions. (hey, I did not write this program ... all the user program association comments are in Deutsch ...) If the CPU power is switched OFF-ON after the I/O is powered, the faults of course, reset. But this action is not a long term solution for reliability. There is an FAQ in teh support section that indicates this could be a problem with IP262's, and OB22 can be delayed to allow the I/O to fully power up before the program scans the I/O. The 24VDC powersupply is beefy enough. How do I delay OB22 or, delay program scanning until the I/O is powered up? BTW, in the attached photo there is no battery (LED on) , that has been replaced ... Not an S5 expert, but I can get around a little ... Thanks for your help! Attachment S5-095U config.jpg (344 Downloads)
Glenn Merrell, CAP Posts: 3 Rating: (1)
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8/18/2010 4:44 AM	Rate (0)
fritz Diamond Expert Joined: 10/7/2005 Last visit: 12/19/2025 Posts: 3052 Rating: (1062)	Glenn Merrell, CAP How do I delay OB22 or, delay program scanning until the I/O is powered up? Hello Glenn Merrell, CAP here's one way: 1.) Find a free (not yet used) FB 2.) Find a free (not yet used)Timer 2.) Add the example logic below to the FB (adjust time delay value to suit) 3.) Call the FB from OB22 Example Logic: A F 255.0 // Scratchflag ANF 255.0 // Create RLO of 0 LKT 010.2 // 10 seconds delay SD T 77 //Call On delay timer with RLO of 0 (i.e.initialise Timer) O F 255.0 // Scratchflag ONF 255.0 // Create RLO of1 SD T 77 //Call On delay timer with RLO of 1 (i.e. start Timer) LOOP:ANT 77 // Timer still running? JC=LOOP // --> wait in Loop BE I hope this helps
	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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8/18/2010 5:47 AM	Rate (0)
Glenn Merrell, CAP Posts: 3 Rating: (1)	Tank Fritz!
Glenn Merrell, CAP Posts: 3 Rating: (1)
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This contribution was helpful to 1 thankful Users fritz

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