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Profibus DP slave deactivation.

1/6/2014 6:25 AM	Rate (0)
Worapong Advanced Member Joined: 8/23/2012 Last visit: 12/24/2025 Posts: 15 Rating: (0)	Hello, I want to deactivate and disconnect an encoderwhich connects to a CPU315-2DPas aProfibus DP salve. I used SFC12 as recommended in this forum.Bus termination has been revised and all parts of the program whichrefer to the P area have been cancelled. My question is why OB122 was still called? Why the CPU still try to read PIB420 since the encoder was deactivated? Attachment Diag Buffer.JPG (205 Downloads)

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1/6/2014 6:29 AM	Rate (0)
Worapong Advanced Member Joined: 8/23/2012 Last visit: 12/24/2025 Posts: 15 Rating: (0)	More detail. Attachment Modul Info.JPG (204 Downloads)

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1/6/2014 6:30 AM	Rate (0)
Worapong Advanced Member Joined: 8/23/2012 Last visit: 12/24/2025 Posts: 15 Rating: (0)	CPU. Attachment CPU Info.JPG (230 Downloads)

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1/6/2014 6:31 AM	Rate (0)
Worapong Advanced Member Joined: 8/23/2012 Last visit: 12/24/2025 Posts: 15 Rating: (0)	Only PIB420. Attachment Module Information.pdf (230 Downloads)

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1/6/2014 6:32 AM	Rate (0)
Worapong Advanced Member Joined: 8/23/2012 Last visit: 12/24/2025 Posts: 15 Rating: (0)	SFC12. Thank you for your reply. Attachment SFC12.JPG (207 Downloads)

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1/6/2014 8:29 AM	Rate (0)
Wizard Diamond Expert Joined: 4/24/2006 Last visit: 1/20/2026 Posts: 9106 Rating: (1204)	Hello Worapong, You have deactivated the slave, but you are still reading and/or writing to the slave. So when you deactivate the slave, using SFC12. You should not read or write to slave anymore. Until you activate the slave again. Best regards, Wizard

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1/6/2014 9:30 AM	Rate (0)
Worapong Advanced Member Joined: 8/23/2012 Last visit: 12/24/2025 Posts: 15 Rating: (0)	Thank you so much. I think Ihave modified the part of the program that read and write to the slave already. Can you please advise how to checkif reading or writing to the slaveare still inthe program?Thank you.

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1/6/2014 10:41 AM	Rate (0)
Wizard Diamond Expert Joined: 4/24/2006 Last visit: 1/20/2026 Posts: 9106 Rating: (1204)	Hello, Perhaps you can use Cross reference. Best regards, Wizard

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