Industrial Electronics Repairer how-to
How to Troubleshoot a Machine Using PLC Inputs
The PLC shows what the machine sees.
Quick answer
The PLC shows what the machine sees. In short: go; find; check, then complete the remaining steps below.
Step by step
Go online with the PLC.
Find the stopped step.
Check required inputs.
Find the missing input.
Test the sensor and wiring.
Fix and test.
Safety reminders for industrial electronics repairers
- Follow lockout/tagout
- Wear arc flash PPE
- Discharge capacitors
- Use ESD protection
Key terms
PLC · HMI · VFD · Sensor · Encoder · I/O: see the full industrial electronics repairer glossary.