batilzown Posted March 9 Report Share Posted March 9 Can you please develop something to eliminate the SD absence warning on startup? The SD card drives up out cost and has no practical use for our application. Saving the alarm history isn't worth its cost in SD cards. Quote Link to comment Share on other sites More sharing options...
MVP 2021 Flex727 Posted March 9 MVP 2021 Report Share Posted March 9 You can't take the requirement for an SD card out of the program? Quote Link to comment Share on other sites More sharing options...
MVP 2021 Ausman Posted March 10 MVP 2021 Report Share Posted March 10 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 1 Quote Link to comment Share on other sites More sharing options...
MVP 2021 Joe Tauser Posted March 11 MVP 2021 Report Share Posted March 11 If you post your program we can be of more help. Joe T. Quote Link to comment Share on other sites More sharing options...
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