File Already in Use

Was bedeutet 16#1405 - 16#00000000 ?

The function block attempted to access a file (for reading or writing) that is currently locked or being used by another instruction within the system. Concurrent access attempts to the same file are not permitted.

• Multiple instructions in the user program are attempting to access the same file simultaneously.

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1. 1

   Modify the user program to ensure that this function block is executed only after confirming the Busy output variable is FALSE for all other instructions that access the same file.