This very simple example shows a TSX CTZ 2AA counting module being used in tandem with a discrete module. It consists of a MAST task and an event task.
The illustration above shows the principle of monitoring automated palette stacking.
External specifications of the application
The PLC is loaded to monitor the palette stacking. Each palette has three compartments. The compartments are inserted under the stacking device with a 4-slot jack V. The last slot is for moving out full palettes.
There are two types of palettes, one with 25 and one with 50 compartments.
The operating principle is as follows:
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The motor M powers a conveyor belt which carries the objects.
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A sensor C counts the objects before they are put back into the palette.
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A telescopic jack V is used to move on to the next compartment when the one in progress is full, and it moves out the full palette.
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A plate P allows you to change the palette.
Activating the motor physically enables counting.
The HMI consists of the following controls:
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25/50 switch: used to choose the type of palette. This takes effect for the next palette (on state),
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New palette button: forces the palette to be changed (on the rising edge),
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New compartment button: forces the compartment to be changed (on the rising edge).
