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Removing the SD absence screen


batilzown

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  • MVP 2023

Further explaining Flex's answer, the message on the screen says it all.  The application  running on the PLC is what has been programmed  into it.  It is NOT the basic operating system that the PLC needs to function.  Somewhere in that program is a set of instructions that need the SD card in place for the application  to work properly.  From your description, that part of the programming is involved in the alarm history.  So your program needs to be modified to completely remove all elements that are trying to access the SD.

Depending on the type of file used, and how much info is actually being stored, the PLC has capability and capacity to retain such a history without using the SD.  For your needs I suspect that the PLC's capacity is way more than you will ever need for your logging.

cheers, Aus

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