DO getting tripped during changed object load.
I am getting one problem during load change object. My DO are getting tripped. means some input is causing the output to fall.
I am doing minor changes in logic like connecting the output from CTC pin to CTP pin,
After plausibility check the colour of the changed object is green only with an arrow in commisioning mode.
When I checked the input connected in interlocks(IDF-1) found that output of an OR gate is causing the issue( by connecting the RS flip-flop to output of OR gate). When I am individually connecting the inputs of OR gate to RS flip-flop and performing the changed object load, then RS Flip-flop not getting "SET". But when I am doing it at the output of OR gate I am getting the problem. but not able to trace it perfectly. The csv is not getting uploaded, due to poor internet, so I am sending the screen shot. Also the log of the controllers.
We have upgraded this system from Freelance 8.2 to Freelance 2013 SP1 in this year,
Voted best answer
As per description and image, seems it's porgramming issue. And didn't see any fault or defect history for recent time in controller log.
As per image and text there it's hard to comment on variable relation to block and about logic untill get simulated myself, But noticed the processing sequence is not proper, processing sequence should be followed from left to right & starting from top to bottom . So correct processing sequence and work on logic will help in resolving your problem, Change load object with green resource block can never cause any problem of tripping or interruption. check image below what should be processing sequence of your logic.
Also you can start from processing sequence 1. You can change processing sequence via RigtClick on block > from context menu select Processing sequence > cursor will take you to bottom right corner of block > Change number > and don't forget to hit enter keyboard button.
Hope that helps...