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- Open the UNLOAD doors and locate the UNLOAD doors switch actuator.
- Cycle the switch by hand and have someone watch PLC (Programmable Logic Controller) input indicator
#7. It should go “ON” when the switch is down. Do the associated L.E.D.’s (light emitting diode) come
“ON” when switch is down?
- If “YES,” wiring is OK
- Check switch placement and door actuation
- If “NO,” check associated:
- Switch and wiring
- Check wiring back to the tumbler junction box
- Check wiring back to the rear controls
- Check PLC (Programmable Logic Controller)
- Refer to blueprints: Main Electrical Panel Diagram
- Tumbler junction box diagram
- Rare panel controls wiring diagram
- Re-test; verify that the signal is operational
4.0 “DRUM FAULT MESSAGE” Malfuntion
a) PROBABLE CAUSES;
1. Stop Motion Detector module or sensor
2. Wiring back to main electrical enclosure
b) PROBABLE SOLUTIONS;
1. Open the Main Electrical Enclosure locate input #0, 10 on the PLC (Programmable Logic Controller).
With control voltage “ON” (Green Push-Button), use the pendant to rotate the tumbler. Notice a
L.E.D. (light emitting diode) on as the tumbler is rotating.
- If the L.E.D. if off, refer to section 1a
1a) If the LED is off:
- Check Fuse 2; replace if necessary
- Rotate the tumbler using the pendant control, and adjust the stop
- Does the module’s L.E.D. respond?