Category: Commissioning & Troubleshooting
Machine Works Cold but Faults After an Hour? Capture the Thermal Pattern
A fault that follows operating time or cabinet temperature deserves a thermal-context investigation.
Read More
The Fault Is Gone After a Reboot—Did You Fix Anything or Erase the Evidence?
A restart can restore service while leaving the cause unresolved.
Read More
Your PLC Simulation Passed. Here Are the Faults It Still May Not Catch
A successful simulation is valuable evidence about the model you tested.
Read More
PLC Output LED Is On, but Nothing Moves: Follow the Missing Power Path
A true output command is only one link in a machine\’s power path.
Read More
4–20 mA Signal Jumping Around? Separate Noise From a Real Process Change
A jumping analog value can come from the process, transmitter, loop, input channel, or scaling logic.
Read More
The Analog Value Looks Right—But Is It the Wrong Channel?
A plausible number is not proof of a correct analog channel.
Read More
PLC Counter Counts Twice per Part? Prove the Edge Before Adding a Delay
A double count can come from two real signal transitions, duplicate counting logic, or an unexpected reset and recount.
Read More
PLC Restarts in the Wrong State? Audit Initialization Before Blaming Memory
After a restart, some values may be retained, others initialized, and others changed by startup logic.
Read More
PLC Sequence Stuck on One Step? Find the Transition That Never Becomes True
A stalled sequence is easier to diagnose when you identify the exact transition it is waiting for.
Read More
Your PLC I/O Check Passed—So Why Is the Wrong Valve Moving?
An I/O check is incomplete if it proves only that a bit changes.
Read More