Ladder Logic Symbols | PLC Programming in RSLogix 5000 Studio Allen Bradley

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#1

Ladder Logic is one of the most common PLC programming languages. The standards of the language are well documented by the International Electromechanical Commission (IEC) in the exhibit 61131-3. However, official documentation of the ladder logic symbols isn’t easy to digest and doesn’t provide concrete examples of each one.

This is a companion discussion topic for the original entry at https://www.solisplc.com/tutorials/ladder-logic-symbols
#2

You have an excellent website ! Regarding ladder logic symbols, Normally closed field devices such as stop, thermal overload, level switches MUST have XIC ladder contacts, the control must be failsafe.

Regards

ian

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