A blog by Galih Eka Priminta

Thursday, April 5, 2012

PLC Twido Training with Schneider Electric Training Centre

Thursday, April 05, 2012 Posted by Galih Eka Priminta No comments
April 3rd 2012
At Schneider Electric Training Center, we are introduced how to use PLC, especially Twido PLC.

 

What is Twido?

TwidoSuite is a full-featured, graphical development environment for creating,configuring, and maintaining automation applications for Schneider Electric Twido programmable controllers.

A programmable controller reads inputs, writes to outputs, and solves logic based on a control program. Creating a control program for a Twido controller consists of writing a series of instructions in one of the Twido programming languages.

Twido Languages

The following languages can be used to create Twido control programs:

  •  Instruction List Language:

An Instruction List program is a series of logical expressions written as a sequence of Boolean instructions. A program written in Instruction List language consists of a series of instructions executed sequentially by the controller. The following is an example of a List program.


  •  Ladder Diagrams:

A Ladder diagram is a graphical means of displaying a logical expression. Ladder diagrams are similar to relay logic diagrams that represent relay control circuits. Graphic elements such as coils, contacts, and blocks represent instructions.The following is an example of a Ladder diagram.


  • Grafcet Language:

Grafcet language is made up of a series of steps and transitions. Twido supports the use of Grafcet list instructions, but not graphical Grafcet. The Grafcet analytical method divides any sequential control system into a series of steps, with which actions, transitions, and conditions are associated. The following illustration shows examples of Grafcet instructions in List and Ladder programs respectively.