25. PLC Troubleshooting Step-by-Step ( 25 of 35 )


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PLC troubleshooting is not about guessing which part is bad.

A good Automation Technician follows a method.

When a machine does not run, the problem could be in many places:

Field device
Sensor wiring
24 …

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28. HMI Basics for PLC Technicians ( 28 of 35 )


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An HMI, or Human Machine Interface, is the screen that allows operators and technicians to interact with a machine or process.

A PLC controls the machine, but the HMI gives the …

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31. PLC Preventive Maintenance: Keeping Control Systems Reliable ( 31 of 35 )


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A PLC system can run for years with very few problems, but that does not mean it should be ignored.

A PLC panel needs preventive maintenance just like motors, gearboxes, sensors, …

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23. Faults vs Alarms (23 of 41)


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In industrial automation, the words fault and alarm are often used together.

But they do not always mean the same thing.

A fault usually means something is wrong enough to stop equipment, …

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