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Status Fail - CPU 315-2DP

Created by: gumis at: 5/2/2009 10:16 PM (7 Replies)

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5/2/2009 10:16 PM	Rate (0)
gumis Posts: 45 Rating: (0)	Dear all, I am programming in STEP7. My program depends on the states of I0.0 - I0.7. When bit 0.7 goes high the Status Fail (SF)diode becomes shining. I want to solve this problem alone but what types of errors cause Status Fail? Best regards, gumis
gumis Posts: 45 Rating: (0)
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5/3/2009 6:31 AM	Rate (0)
UMENCHO Diamond Member Joined: 3/21/2006 Last visit: 9/10/2024 Posts: 10228 Rating: (1181)	Hello, Did you checked in Diagnostic buffer of CPU about this SF? Can you attach here screenshot of it here? Best regards Hristo Mihalev

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6/8/2009 9:25 AM	Rate (0)
how come Posts: 382 Rating: (47)	Dear gumis, There could be some program errors or connection errors. If possible make a screenshot of your program blocks here. So that everyone in the forum and have a better idea to help you. Thanks! with regards, how come?
how come Posts: 382 Rating: (47)
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6/8/2009 11:59 AM	Rate (0)
Morten Bronze Member Joined: 9/27/2005 Last visit: 4/26/2024 Posts: 203 Rating: (32)	Hallo, maybe the adress 0.7 do not exist? Please follow the tips for the diagnostic buffer. Regards Morten

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6/8/2009 12:06 PM	Rate (0)
Niranjan Prasad Posts: 691 Rating: (37)	What is this "0.7"? Is it I 0.7 , Q0.7 or M 0.7?
Niranjan Prasad Posts: 691 Rating: (37)
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6/8/2009 12:55 PM	Rate (1)
Sydney Gold Member Joined: 1/4/2008 Last visit: 9/2/2024 Posts: 703 Rating: (96)	Hello, I'm pretty sure that the address I 0.7 does exist in every PLC . Probably there is some user programm code depending on this input which makes the fault. The Diagnostic Buffer can bedisplayed by rightclick on the CPU, menu PLC->Module Information..., then in window appeared look for tab Diagnostic Buffer. Regards Sydney

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6/13/2009 9:15 AM	Rate (0)
Paresh Posts: 116 Rating: (1)	Hi Sydney, I agree with you that I0.7 exists in each PLC. But what if any Input registers in not bit addressable? In such case you to access whole Input registers may with IW. Please correct me if I am wrong. Thanks and Regards Paresh
Paresh Posts: 116 Rating: (1)
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6/13/2009 12:57 PM	Rate (0)
Sydney Gold Member Joined: 1/4/2008 Last visit: 9/2/2024 Posts: 703 Rating: (96)	Hello, of course the I 0.7 is a part of the input area and can be accessed by different waysaccordingly to meanings, e.g. bit or part of status word or part of a number and so on. Regards Sydney

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