12/8/2009 12:05 PM | |
Joined: 4/24/2006 Last visit: 11/6/2024 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 |
2/10/2010 11:40 AM | |
Joined: 4/24/2006 Last visit: 11/6/2024 Posts: 8768 Rating: (1170)
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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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