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Industrial Automation, PLC, VFD, and Troubleshooting

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9. Number Systems for PLC Technicians


July 12, 2026 JoeGuardian 0

When working with PLCs, it is important to understand that the controller does not “think” the same way humans do.

Humans normally use the decimal system:

0, 1, 2, 3, 4, 5, …

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15. VFD Communication Basics: Reading Status, Faults, and Speed from a PLC (15 of 19)


July 5, 2026 JoeGuardian 0

Introduction

In modern industrial automation, a Variable Frequency Drive is often more than a stand-alone motor controller. Many VFDs communicate directly with a PLC, HMI, or SCADA system.

Instead of using only …

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