All job plans
InstrumentationCorrectiveGeneral
PLC Discrete I/O Verification
Point-to-point verification of PLC digital inputs and outputs after card or wiring changes.
Estimated time
2 hours
Craft required
2 technician(s)
Skill level
specialist
Procedure steps
- 1
Obtain I/O list and wire drawings for the rack
~15 min - 2
Verify each DI changes state when field device actuated
~40 min - 3
Verify each DO energizes field device when commanded
~40 min - 4
Clear all forces; confirm program in RUN
~10 min - 5
Sign off I/O checklist with operations
~10 min
Safety notes
- Do not force outputs that drive motion without clearance
- Use supervised forces only
Tools
- • Laptop with PLC software
- • Multimeter
- • Force/monitor tool
Parts
No parts required