FC85 FIFO Problem

SIMATIC S7-200/300/400, Step7, PCS7, CFC, SFC, PDM, PLCSIM,
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noutec74
Posts: 11
Joined: Wed May 01, 2013 2:05 pm

FC85 FIFO Problem

Post by noutec74 » Sat May 16, 2020 6:53 am

Hello there

I have a little question,,, I always got a problem when using function FC84, FC85 FIFO,, even I wrote everything correct & also the data in DB but when I made the trigger the PLC made System Fault,,,, could I know why the reason

I hope to have your reply soon as I need this function in my project
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Guille
Posts: 32
Joined: Fri Oct 03, 2008 2:17 am
Location: America

Re: FC85 FIFO Problem

Post by Guille » Sat May 16, 2020 2:15 pm

it is not easy to guess what is going on, probably the fc is reading or writing to a not existent nemory area...
Check the diagnostic buffer to see why the plc go to stop.
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