Instruction list

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Instruction List is one of the 5 languages supported by the IEC 61131-3 standard. It is designed for programmable logic controllers (PLCs). It is a low level language and resembles assembler. All of the languages share IEC61131 Common Elements. The variables and function call are defined by the common elements so different languages can be used in the same program.

The file format has now been standardized to XML by PLCopen.

[edit] Example

         LD     Speed
         GT     1000
         JMPCN  VOLTS_OK
         LD     Volts
VOLTS_OK LD     1
         ST     %Q75

[edit] See also

Programmable Logic Controller

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