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Electrical system.................................................................5
Conveyor
1. Start the machine in either “AUTO” or “MAN” mode (see Starting procedures in this chapter).
2. Turn the “OFF/TRAM/CONVEYOR” selector switch located on the cover of the starter enclosure to the “CONVEYOR” position.
3. Push the “START CONV/PUMP” button to start the conveyor motor.
4. Turn the “OFF/FWD/REV” selector switch located on the cover of the starter enclosure to the “FWD” position.
It is important to note the following concerning the operation of the conveyor in the forward direction:
– The current of the breaker shaft motor is constantly monitored by the PLC. If the current remains below 100% of the full load current (FLA), the conveyor will continue to run at the set speed.
– If the current increases above 125% FLA and stays at that level for three seconds, the PLC will assume there is a conveyor jam. The
PLC will try to clear the jam by stopping the conveyor, running it in reverse for three seconds at 10% speed, and then running it forward for ten seconds at 25% speed.
– If the current at this point is still above 125% FLA, the conveyor will repeat the above reverse/forward sequence for a second time.
– If the current at this point is still above 125% FLA, the conveyor will repeat the above reverse/forward sequence for a third time.
– If the current at this point is still above 125% FLA, the machine will shutdown and the display will read “BIG JAM”. The conveyor will need to be cleared before operation resumes.
– If the current drops below 125% FLA at any time during the three reverse/forward sequences, the speed of the conveyor will ramp back up to the set speed.
IMPORTANT! If it is necessary to reverse the conveyor, it should be jogged only. Running the conveyor in the reverse direction for a period of time with material in the hopper, will jam the conveyor and it will be necessary to empty the machine hopper before the conveyor will restart.
Operating the conveyor in reverse
1. Turn the “OFF/FWD/REV” selector switch located on the cover of the starter enclosure to the “REV” position. The conveyor chain will now run in reverse at 25% full speed as long as the switch is in the “REV” position. Note: the conveyor should not be run in reverse for extended periods; only jog the conveyor when in reverse. ______________________________________________________________
