Industrial Automation, PLC, VFD, and Troubleshooting
From Basic Concepts to Advanced Troubleshooting
Introduction
In industrial automation, technicians frequently encounter devices installed between field instruments and control systems that are often misunderstood.
These devices are commonly called:
Intrinsic Safety Barriers
Isolated Barriers
Signal …
Read MoreIs It the Sensor, Wiring, PLC Card, Scaling, or HMI?
Analog input troubleshooting is one of the most valuable skills for an automation technician.
When an HMI value looks wrong, unstable, frozen, …
Read MoreFrom Raw Counts to Engineering Units
In industrial automation, a PLC does not automatically understand pressure, level, flow, temperature, or weight.
The PLC receives an electrical signal from the field instrument. That …
Read MoreUnderstanding Live Zero and Signal Faults in 4–20 mA Loops
In industrial instrumentation, one of the most important concepts for automation technicians to understand is this:
In a 4–20 mA signal, 4 …
Read MoreA Practical Guide for Automation Technicians
One of the most important signals in industrial instrumentation is the 4–20 mA current loop.
If you work with pressure transmitters, level transmitters, flowmeters, temperature transmitters, …
Read MoreDiscrete, Analog, and Digital Signals for Automation Technicians
Industrial instruments measure real-world process conditions such as pressure, level, flow, temperature, weight, pH, or gas concentration. But the PLC cannot directly read …
Read MoreWhat Automation Technicians Need to Understand
In industrial automation, a process variable is any physical condition that must be measured, monitored, displayed, controlled, or used in logic.
A PLC does not directly …
Read MoreA Practical Guide for Automation Technicians
Industrial instrumentation is one of the most important areas in automation because it connects the real physical process to the control system.
A PLC, HMI, or …
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