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cRIO 9035 suddenly stopped scanning I/O

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Our cRIO 9035 was running fine when it suddenly stopped scanning the I/O yesterday, after which the program just pops up error messages (...timeout, cannot [read input#/write output#]) one after another, going through the entire I/O in it sequence.

 

Any idea what may have happened, here? It was running fine when this suddenly happened. It was not being programmed, but was running so as to monitor the input values from its 0-20mA input module.


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