Industrial Automation, PLC, VFD, and Troubleshooting
In PLC systems, not all signals are the same.
Some signals are simple ON/OFF signals. Other signals represent a changing value such as pressure, temperature, tank level, speed, or weight.
That is …
Read MorePLC Addressing: Rack/Slot vs Tag-Based
In a PLC system, every input, output, and internal memory location needs a way to be identified by the controller.
This identification method is called addressing.
In simple …
Read MorePLC 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 …
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 …
Read MoreHow to Diagnose a Control Panel That Appears Completely Dead
One of the most common troubleshooting situations in an electrical control panel is this:
Nothing works.No lights.No relay response.No motor starter.No PLC …
Read MoreHow to Diagnose PLC-Controlled Circuits Without Guessing
PLC troubleshooting is one of the most important skills for an automation or maintenance technician. In modern industrial panels, the PLC is often the …
Read MoreIn modern industrial automation, 24 VDC control power is one of the most important systems inside a machine.
Many devices depend on it:
PLC inputsPLC outputsPhotoelectric sensorsProximity sensorsLimit switchesSolenoid valvesRelaysAnalog transmittersHMI control …
Read MoreA PLC, or Programmable Logic Controller, is one of the most important devices in industrial automation.
It is the controller that reads field signals, executes logic, and controls machine outputs.
A PLC …
Read MoreA PLC does not execute logic randomly.
It follows a repeated process called the scan cycle.
Understanding the scan cycle is one of the most important steps in learning PLC troubleshooting and …
Read MoreIn many industrial machines, not all inputs and outputs are wired directly to the main PLC panel.
Instead, many systems use Remote I/O.
Remote I/O allows input and output modules to be …
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