Jog / Run Motor Control

Briefing

A classic two-mode motor starter. SELECTOR_RUN_MODE selects between Run mode (latched via RUN_PB) and Jog mode (CONTACTOR energised only while JOG_PB is held). An E-stop or thermal overload latches a fault that blocks operation until STOP_PB is pressed and the fault condition clears. Lamps indicate the current operating mode.

Objectives

• In RUN mode: RUN_PB latches CONTACTOR (seal-in); STOP_PB drops it
• In JOG mode: JOG_PB energises CONTACTOR only while held; release drops it
• ESTOP or OVERLOAD drops CONTACTOR and latches FAULT_LAMP
• Fault clears only when STOP_PB pressed AND fault condition cleared
• RUN_LAMP on while CONTACTOR energised in run mode; JOG_LAMP on in jog mode while held

I/O Table

Your program will be tested against:

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

1. #1Run mode: RUN_PB seals in CONTACTOR

   In run mode, momentary RUN_PB energises and latches contactor

2. #2Jog mode: CONTACTOR only while JOG_PB held

   In jog mode, contactor follows JOG_PB exactly

3. #3E-stop latches fault, cleared by STOP_PB after restore

   E-stop drops contactor and latches fault until STOP_PB + E-stop cleared

4. #4Thermal overload latches fault, requires overload reset + STOP_PB

   Overload trip drops contactor and latches fault until trip clears and STOP_PB pressed