Example: How to create an HSC program

This example shows how to create an HSC program that uses a quadrature encoder and includes a Programmable Limit Switch (PLS) function.

Quadrature encoder used in the example

The HSC program example uses an HSC function block and a quadrature counter with phased inputs A and B. The quadrature encoder determines the direction of rotation and the position for rotating equipment, such as a lathe. The Bidirectional Counter counts the rotation of the quadrature encoder.

The following quadrature encoder is connected to inputs 0 and 1. The count direction is determined by the phase angle between A and B:

If A leads B, the counter increments.

If B leads A, the counter decrements.

Create an HSC program

Perform the following tasks to create, build, and test the HSC program, and then add a PLS function.

Steps to create an HSC program
Step	Task
1	Create a ladder diagram and add variables
2	Assign values to the HSC variables
3	Assign variables and build the program
4	Test the program and run the high-speed counter
5	Example: Add a Programmable Limit Switch function

Use the high-speed counter instructions

Create a ladder diagram and add variables

Assign values to the HSC variables

Assign variables and build the program

Test the program and run the high-speed counter

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