Set/Reset hangs

To eliminate the obvious, can you clarify the following:


Are there any other devices that can write to plc tags - HMI, other plcs, PCs?


Did you write all of the code yourself?


Is there any indirect addressing in the code?


Is there any block moves in the code?


Is there any PEEKs/POKEs in the code?

+1 on the trace.
Trace all the relevant variables.
"Sekvenser".Test_Seq_1
"Sekvenser".Test_Seq_2
"Conveyor_5.1_Outlet"
"Transferchain_7.3_1_Done"

And answer LDs questions.