Ladder Logic is the universal programming language for PLCs worldwide. It is a graphical language with symbols that resemble the contactors and relays which were used in early 1950's before the PLCs were invented. The Language was such that even semi skilled electricians and maintenance personnel could follow the logic of these contactors and coils to start and stop motors, valves and other Electro Mechanical devices.



When PLCs came into existence, the PLC manufacturers followed the same convention. However each manufacturer chose their own rules for connecting and adding ladder elements, such as start and stop contacts. Just like English, Spanish, German, Chinese, Hindi and other languages, have their own scripts and their own grammar, PLC manufacturers like AB, Modicon, Seimens, Mitsubishi, Uticor and others developed their own grammar and syntax. Once you learnt one language, you usually stuck with that brand of PLC.

Today one single plant is likely to have multiple brands of PLCs, requiring Electricians & Maintenance personnel to remember these multiple languages. One may had learnt AB Language months ago, but had not gotten a chance to use it. So if he/she has to troubleshoot an AB PLC system months later, he/she is going to struggle for a while trying to remember the correct syntax. If it is a Siemens PLC, it might take the same person a week to just get started. It is in this context the PLC Drag-n-Drop software was developed. It requires no complicated syntax and rules. It can be learnt in a few minutes.

Below is an example showing how this almost free $49 software can easily insert a normally open contact in a ladder rung. All you have to do, pick up an ladder element from the toolbar, drag it and drop where ever you want, it will guide you to fill the necessary data.



View Video Demo
View Software Demo