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CE111 - Experiment

PLC PROCESS

A self-contained, benchtop liquid flow and level process, providing a physical system to experience the programming of programmable logic controllers, for use with the PLC Trainer (CE123).

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Description

PLC PROCESS

TecQuipment’s PLC Process gives students and engineers practical experience of the principles and application of programmable logic controllers (PLCs). The object is to connect and program an external, programmable logic controller to monitor and control the level and flow rate of water in a two-tank system.

The apparatus has two transparent tanks, mounted one above the other. A variable-speed pump transfers water from the reservoir (in the base of the unit) into the upper tank. The water can drain down to the lower tank and then back into the reservoir. Solenoid valves may be individually opened or closed to control and redirect the movement of the water. The pump control is on or off, but a manual control allows the user to set the speed. A float switch in the reservoir monitors the level of water.

Each tank includes two level sensors which measure maximum and minimum water levels. An in-line flow sensor provides a pulsed output. Its frequency is proportional to the flow rate and the number of pulses proportional to volume.

Indicators next to each input and output socket show the on/off status of the pump, the valves, the maximum and minimum level in each tank, and the flow rate.

An overflow in each tank prevents accidental overfilling.

Note: You must use the PLC Process with TecQuipment’s PLC Trainer (CE123). A multi-way lead connects the unit to the trainer. This lead carries the power for the pump and valve solenoids, and completes the return path for the input and output sockets. Refer to separate datasheet for details of the PLC Trainer (CE123).

Learning outcomes

When used with the CE123:

  • Basic programming of a PLC
  • Basic level control
  • Tank filling sequence
  • Simulated batch processing (sequencing)
  • Ladder logic programming
  • Editing and adding comments in a PLC program

The open structure of the CE111 and CE123 allows the user to create additional experiments to suit their needs.

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Essential Base Units
Recommended Ancillaries

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