Hello, Sir. I have been creating an environment for factory io to pick and place xyz, two palletizers and warehouse stacker crane so all of the pallets will be in place. For each of these machines, i made an FB especially for palletizers so i would only copy and paste and change my address. When I tried to run one by one pick and place and palletizers, there is no problem. The machines run perfectly as i designed it to be. Then, I tried to run pick and place and palletizer 1, it’s also running normal. Same with pick and place and palletizer 2, it is running normal. The problem comes when i run all of them at the same time. The two palletizers are not stopping. The boxes and box feeder are not stopping as i designed for it to stop after the count.For palletizer 1, I made an FB for my logic and i made an FC to separate my counters so that it would look clean and would not confuse me. and I put that FC inside the FB.same as for the palletizer 2, i made an FB and separate my counters in FC and put the FC inside my FB. and finally, I put all the FB inside the OB1.My question is: Was i correct in putting my FC inside the FB and the content of my FC is only about counters and also counter for my digital display in the panel? thank you.

If you used an S7 counter (S_CU), they are single instance. If you placed the counter in an FC that is called by multiple instances of the Palletizer FB, then you will likely have the problem you described. To verify, monitor the value of the counter and see if the number of counts is being overwritten or not updated at all. Also, counters need to be reset using a tag, so make sure that the reset tag is being set correctly.

For multiple instances, I would use an IEC counter, which has its own DB associated with it. That will allow you to keep the data for each instance of the counter FC separate from the other instances.