18. Program Control Instructions: JSR, MCR, JMP, and Fault Routine ( 18 of 35 )


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In PLC programming, not every instruction directly turns on a motor, counts a box, or starts a timer.

Some instructions are used to control how the PLC program executes.

These are called …

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27. Output Malfunctions: How to Troubleshoot PLC Outputs ( 27 of 35 )


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PLC output problems are very common in industrial automation.

A machine may have the correct input signals, the logic may look true online, but the real device still does not operate.

Examples:

The …

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33. PLC Programming Best Practices: Structure, Tags, Comments, and Troubleshooting ( 33 of 35 )


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PLC Programming Best Practices

A PLC program should not only make the machine run.

A good PLC program should also be:

Easy to understand
Easy to troubleshoot
Easy to modify
Easy to document
Easy to recover
Safe to …

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