10-4
10TA Service Manual
OPTIONS AND ACCESSORIES
PLC (Programmable Logic Controller)
Tube-Ice
®
machines are available with a Mitsubishi Fx
1N
24MR programmable controller,
FX
2N
-8ER expansion module and a Mitsubishi E1012 Operator interface. The E1012 interface
contains a real-time clock and 6 programmable function keys that allow for easy screen
navigation and enhanced machine operation over the standard Tube-Ice
®
machine mechanical
controls.
Note: The E1012 interface replaces the E150 and requires a 24VDC power supply to power the
unit, where the E150 was power by the plc.
The PLC/Interface add features such as selectable “Automatic Restart” after a power failure,
choice of timed or pressure switch controlled freeze cycles and Freezer “pumpdown”. For
package units, the machine will automatically “Pumpdown” before cycling off.
The PLC/Interface provides programmable:
• Cutter delay (amount of time at start of harvest before cutter comes on)
• Conveyor control contacts (delay at start of harvest before conveyor comes on and run time).
• Automatic Restart after a Power Failure (enable/disable)
•
Auto-restart time (delay time before restarting – recommended 2 hours for package
machines)
The PLC provides Machine Fault indication with an alarm relay. The PLC will log when the
“fault” occurred (time and date) and were in the cycle the machine was when the fault occurred.
Machine Faults:
• Compressor high discharge pressure
• Compressor low suction pressure
• Compressor oil pressure
• Compressor motor fault
• Cutter motor overload
• Water pump motor overload
• Long cycle - a freeze cycle lasting more than 60 minutes
• Short cycle - 3 consecutive freeze cycles 5 minutes or less in duration
• Power failure / Power return
Pumpdown Cycle
Package Machines: When machine is turned “off” or the bin control tells the machine to
cycle off, the machine will complete the harvest cycle then go to the Pumpdown Mode.
During the Pumpdown cycle, the compressor and water pump will be “on”. When the FPS
(freezer pressure switch) makes, the machine will go through a 60 sec Pumpdown harvest.
(Note: Pumpdown harvest can be turned off using the Main Setup screen.) After
completing this short harvest, the machine will continue to pump down until it shuts off on
low pressure.
.
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