Sequence control
Verify control circuits as operating sentences
Trace start, hold, stop and fault behaviour instead of memorising symbols alone.
Define the initial state
Mark coil and contact state immediately after power-up.
Trace each input
Follow the energising and seal-in path after pressing start.
60 items · 60 minHands-on · 270 min60 each
Check interlock purpose
Confirm that conflicting operations cannot occur together.
Test stop and fault states
Predict overload and power-return behaviour as well as normal start.