Troubleshooting a PLC program is a skill that every PLC programmer will need to develop. However, in a large project involving many programming blocks and signals, it can be challenging to quickly identify the various call structure and monitor the different places a signal has been used in each block hence making troubleshooting difficult.
This is a companion discussion topic for the original entry at https://www.solisplc.com/tutorials/plc-troubleshooting-using-cross-referencing-and-overlapping-access-in-siemens-tia-portal