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2/20/2009 8:18 PM | |
Joined: 12/22/2006 Last visit: 1/25/2022 Posts: 1742 Rating:
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Hello, From what you tell, I believe the following - the SCADA is always working because it uses S7 protocol and no program is required in the PLC to answer to the SCADA requests (it is handeld by the operating system of the CPU). - you have a problem in the send/receive interface, may be becauseyou did not respect some programming rules. Incorrect interlocking of send jobs can cause problems. See here: http://support.automation.siemens.com/WW/view/en/17853532 - the FC5, FC6 have status words giving some information on what is going on. - I never did it myself with a CP, but if I follow the manual System Software for S7-300/400 System and Standard Functions, you could read the LED status of a moduleby reading thea system status list (SSL) with SFC51 SSL-ID W#16#xy19 - Status of the Module LEDs |
Best regards |
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