I had a belt that conveys brick with multiple moves, stops and runs.. Each brick which is different has a different product setup for certain pulls and move lengths.
Now basically at the end of the groups shift this belt would no longer run in automatic nor would it jog in manual mode from the HMI screen. But I was able to move the belt via MoviStudio (Movidrive Inverter to Sew motor) and with the DBG pendant.
Short of the story was that in Rslogix MOVE file the plc basically zerod out all the moves. The HMI screen had all zeros for moves also. But the actual parameter tag list was perfectly fine with the correct positions.
My question is how can this happen other than someone manually adjusting all the moves on the HMI (honestly the operators would NOT do it, I am serious) It was a on day when it is possible the power for the plant flickered. But there is no other indication of other parameters being lost.
Once I changed the HMI to a different style of brick the new move parameters where put in for that brick and the belt worked just fine. But at the same time the ZEROS in the move files moved to the Serperation moves 16 tag.
I had to download an older version of the program (1 day older) with the correct values to fix this issue.
This pictures are after I fixed the issue.
Now basically at the end of the groups shift this belt would no longer run in automatic nor would it jog in manual mode from the HMI screen. But I was able to move the belt via MoviStudio (Movidrive Inverter to Sew motor) and with the DBG pendant.
Short of the story was that in Rslogix MOVE file the plc basically zerod out all the moves. The HMI screen had all zeros for moves also. But the actual parameter tag list was perfectly fine with the correct positions.
My question is how can this happen other than someone manually adjusting all the moves on the HMI (honestly the operators would NOT do it, I am serious) It was a on day when it is possible the power for the plant flickered. But there is no other indication of other parameters being lost.
Once I changed the HMI to a different style of brick the new move parameters where put in for that brick and the belt worked just fine. But at the same time the ZEROS in the move files moved to the Serperation moves 16 tag.
I had to download an older version of the program (1 day older) with the correct values to fix this issue.
This pictures are after I fixed the issue.
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