ClassicLadder

: 1. Documentation for classicladder ver 0.7.100 (EMC 2.1 - 2.2.8)
: 2. Documentation for classicladder ver 0.7.124 (EMC 2.3 - present)
: 3. Ladder samples

ClassicLadder is a type of programming language originally implemented on industrial PLC's (it's called LadderProgramming).
It is based on the concept of relay contacts and coils, and can be used to construct logic checks and functions in a manner that is familiar to many systems integrators.
It is important to know how ladder programs are evaluated when running:

        It seems natural that each line would be evaluated left to right then the next line down etc-but it doesn't work this way.
        For each (6 line) rung, ALL the inputs are read, ALL the logic is figured out, then ALL the outputs are set, then the next rung is evaluated etc.
        This can presents a problem in certain circumstance if the output of one line feeds the input of another

Classicladder is the original work of Marc Le Douarain.
Classicladder version 0.7.100 is included in emc2.1 to EMC 2.2.8.

1. Documentation for classicladder ver 0.7.100 (EMC 2.1 - 2.2.8)

This page documents the features and workings of ClassicLadder ver 0.7.100 available from EMC 2.1.x to EMC 2.2.8
While specific to version 7.100 much of the info is relevant to later versions of CL.

Classicladder ver 7.100

2. Documentation for classicladder ver 0.7.124 (EMC 2.3 - present)

This page documents added features in ClassicLadder ver 7.124
Also find info about it in the EMC2 manual / wiki page http://www.linuxcnc.org/docs/devel/html/ladder_classic_ladder.html

3. Ladder samples

Please go to here for examples: ClassicLadderExamples