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CPU 315-2DP: facing Error LED (SFC) is red

Created by: Import-User-1 at: 12/8/2009 9:04 AM (4 Replies)

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12/8/2009 9:04 AM	Rate (0)
Import-User-1 Posts: 3609 Rating: (29)	Import of a Technical Question of an User Indu. wrote: Dear Sir, I m using CPU 315-2DP and i m facing Error LED (SFC) is red that to do for thisand one another problem is that i can not go online more than one block if i go online to another block but the first one goes offline plz help me .waiting ur positive reply. Thanks & Regards Naresh Kumar
Import-User-1 Posts: 3609 Rating: (29)
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12/8/2009 12:05 PM	Rate (0)
Wizard Diamond Expert Joined: 4/24/2006 Last visit: 11/11/2024 Posts: 8768 Rating: (1170)	Hi, When led SF is on, you should have a look in Diagnostic Buffer to see what is the problem. About monitoring just one block: A s7-300 only can monitor 1 block at a time. (Some new CPU's can monitor 2 blocks at a time) http://support.automation.siemens.com/WW/view/en/22725914 http://support.automation.siemens.com/WW/view/en/19267653 Best regards, Wizard

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12/8/2009 7:02 PM	Rate (0)
Nitin Naresh Experienced Member Joined: 6/6/2008 Last visit: 10/20/2024 Posts: 2 Rating: (0)	Hi, First of all i would like to say thnxx for ur quick rely. May be SF LED is on due to my 2 ET-200M module i disconnect to the power and last profibus termination is on . But these two module is in the hardware configuration thats why SF LED is red . waiting ur reply. Thanks & Regards Naresh Kumar

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12/9/2009 9:36 AM	Rate (0)
Wizard Diamond Expert Joined: 4/24/2006 Last visit: 11/11/2024 Posts: 8768 Rating: (1170)	Dear Indu, That could be a reason. Perhaps you are reading and writing to Profibus slaves, which are not available. (You will have read or write errors) But you can only be sure, when you readout the diagnostic buffer. Best regards, Wizard

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2/10/2010 11:40 AM	Rate (0)
Wizard Diamond Expert Joined: 4/24/2006 Last visit: 11/11/2024 Posts: 8768 Rating: (1170)	Indu Dear Sir, Greeting to u . I m using CPU 315-2DP and ET200M there r 6 ET200M connected on profibus out of 6 module 2 i did not connect . when i checked hardware Diagnostics its showing 4 module is ok and 2 r not ok but its ok bcoz two modules power is off . But problem is that SF LED is RED and BF LED is blinking continuously plz help me what is the problem. waiting ur positive reply. Thnx and Regards Naresh Kumar Dear Naresh Kumar, The SF led is shown, because in hardware configuration you have more slaves, then there are actually. (Missing some slaves) and that also be the reason for blinking the BF led. Perhaps your programm is reading or writing to this disabled slaves? (Reason for SF led) When you use the right OB's, your CPU will stay in RUN. (But SF led will show) Which organization blocks do you have to load into the CPU to ensure that the CPU does not go into the "STOP" status when a remote I/O fails? Perhaps youcan use SFC12 (to disable not used slaves): Enabling a disabled DP slave with SFC 12 "D_ACT_DP" Disabling DP slaves after startup of the CPU But to be sure, you will have to readout the diagnostic buffer!!! Best regards, Wizard

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