If you’ve ever wanted to learn how to program PLCs — a very marketable job skills in some places — you can now build and simulate ladder logic in your browser.

And, the ability to monitor PLC logic in ladder diagram format also made troubleshooting easier for those already familiar with relay-based control systems. Although there are many higher-level ...

If you are used to conventional programming, you may find ladder logic a little frustrating. Originally, it was a documentation tool for relay logic but has grown to handle modern cases.

PROGRAMMING METHODS In previous articles, I have discussed ladder logic, which is very much a sort of electronic schematic symbolization of the control system you are designing. This makes programming ...

Basics of Ladder Logic provides an overview of the basic principles, structure, and symbols of ladder logic programming. This class introduces the components of ladder logic programming language used ...

The ladder logic looks quite a lot like the actual fluid flow through the system. If I push this button, valves x, y, and z open, pump n switches on, and fluid flows.

THE HUMAN-MACHINE INTERFACE Among the ways to interface and program the PLC, you may use a PC running the programming software and “hard-code” the program parameters such as set points, timer delays, ...

THE use of function blocks for programming of programmable logic controllers (PLCs) is gaining wider acceptance. Rather than the classic “contact and coil” representation of ladder diagram or relay ...

Programmable logic controllers (PLCs) are used extensively throughout the world. Over time, they have advanced to become more user-friendly, efficient, smaller, and less expensive. Different types of ...

Efficiency is another major advantage. “A ladder-logic program will be a lot more efficient if it is used in conjunction with PLCopen Motion Function Blocks,” Al-Ashqar asserts. Too, he says there’s ...