Industrial Automation, PLC, VFD, and Troubleshooting
RSLogix 500 and Studio 5000 Examples
In industrial PLC programming, a machine state is a numeric value that tells the program what step or condition the machine is currently in.
Instead of …
Read MoreBuilding Professional and Industrial Ladder Logic with State Machines, Subroutines, and Status Codes
In a basic PLC program, it is common to organize the logic using a simple structure:
Input BufferingMode SelectionRequestsPermissivesInterlocksCommandsFault …
Read MoreA Simple and Professional Way to Organize Ladder Logic
In industrial PLC programming, the logic should not be written randomly. A professional PLC program is usually organized in a clear sequence …
Read MoreIntroduction
In industrial automation, one of the most important differences a technician must understand is the difference between a fault and an alarm.
At first, both may look similar because both indicate …
Read MoreA Critical Difference Every PLC Technician Should Understand
In industrial automation, two words are often used together but do not mean exactly the same thing:
Permissive and Interlock
Both are used to control …
Read MoreUsing CTU, CTD, and RES to Count Real-World Events
Counters are one of the most useful instructions in PLC programming because industrial machines are constantly counting something.
A PLC may need to …
Read MoreUnderstanding the Three Most Common PLC Timer Instructions
Timers are one of the most important instructions in PLC programming. They are used everywhere in industrial automation.
You will see timers used for:
Start-up …
Read MoreOne of the Most Important PLC Ladder Logic Patterns
One of the first ladder logic circuits every PLC beginner should understand is the Start/Stop seal-in circuit.
This circuit is also called a:
Start/Stop …
Read MoreFiltering Noisy Inputs and Preventing Unstable PLC Logic
In industrial automation, field devices do not always send perfectly clean signals to the PLC. A sensor, limit switch, push button, or relay …
Read More