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sporadic SD Card not present


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I have a V350 with trends and csv to SD. It works well but sometimes when the customer switch on the PLC we see the SB217=0. If you remove the SD and insert again the error is the same.

I have seen that the only way to back to run is remove SD from OPLC, to insert in a PC doing nothing more and back to the OPLC.

The application is a datalogger, if we have problems with the SD we will have a serious problem.

Any idea to resolve it?

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