Competency and practice field guide
Solenoid-valve learning lesson: practice plan
Direct answer
The learner can distinguish command, coil energization, spool state, fluid path and physical feedback, then isolate failures at each boundary.
Written for electrical, pneumatic and PLC learners tracing an output command through a coil and valve spool to actuator or process response.
Scope
Media, ports and positions, normal state, monostable or bistable spool, coil voltage and power, suppression, output interface, pressure, flow, manual override and feedback.
Signal path
PLC command through output module and protection to coil field, spool movement, port connection, actuator or process response and independent feedback.
Baseline practice
Energize, expected port change, physical result, de-energize and return state repeated at declared supply conditions.
Edge cases
Wrong voltage, open coil, short, output leakage, stuck spool, blocked exhaust, low pressure, manual override, lost power and restart.
Fault practice
A command, output, wiring, coil, magnetic, spool, pressure, flow, actuator or feedback mismatch.
Transfer to the job
The selected valve and interface reviewed against current data and verified under safeguarded physical conditions.
How does a PLC control a solenoid valve?
A compatible PLC output or interface energizes the coil; the resulting magnetic force shifts a spool or poppet that changes the fluid path.
Why is a solenoid energized but the valve does not switch?
Wrong voltage, insufficient power, a damaged coil, blocked armature, stuck spool, pressure condition, manual override or mechanical contamination can separate coil indication from flow.