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10 min

CCST 14 — Diagnose: Seal-In Missing

ccstdiagnosticsseal-inmotor

CCST 14 — Diagnose: Seal-In Missing scenario preview

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Briefing

The motor drops immediately when the start button is released. The seal-in branch is missing. Add the parallel MOTOR_CONTACTOR contact.

Objectives

Identify that the contactor does not latch
Add parallel MOTOR_CONTACTOR contact (seal-in)
Verify motor stays on after start button released

Hints

The fix is a single parallel branch: OR MOTOR_CONTACTOR in the rung condition

I/O Table

Inputs

START_PB

Start push-button

BOOL · %I0.0

STOP_PB

Stop push-button

BOOL · %I0.1

Outputs

MOTOR_CONTACTOR

Motor contactor

BOOL · %Q0.0

Your program will be tested against:

All test cases run automatically when you submit. Assertions are hidden until you pass.

#1Motor seals in
Motor seals in

Related scenarios

Motor Start/Stop

motorsafetylatching

Jog / Run Motor Control

motorjogselector

Forward / Reverse Motor

motorforward-reverseinterlock

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