Process interfacing via an automation system (PLC, PC)
10.4 Control with FB79
SIMATIC MV420 / SIMATIC MV440
292 Operating Instructions, 04/2013, A5E02371045-06
10.4.4.1 Error information of FB79
Error information
If an error has occurred, ERROR = TRUE is set. The precise cause of the error is then
displayed in ERRCODE. There are also warnings for which ERROR is set to FALSE. They
indicate error situations that do not cause the current job to be canceled.
If ERRCODE <> DW#16#0000 0000 following an FB call, you will need to call the FB again
with RESET=TRUE to reset the error information in the FB.
Note
By calling the FB with RESET=TRUE, you acknowledge only the error codes of the FB. To
acknowledge errors of the reader (for example, transmit error), you will need to set the RES
bit of the control byte (see assignment of the interfaces of the reader relevant for PROFINET
IO or error messages).
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