Rockwell Software:

microsoft certified partner
 

IEC 1131


   What Is IEC 1131?
   Ladder Diagram
   Sequential Function Chart
   Function Block Diagram
   Structured Text
   Instruction Lists
 

IEC 1131 Instruction List Overview
This low-level language is similar to Assembly language and is useful in cases where small functions are repeated often. Although it is powerful, it is considered to be difficult to learn.

Instruction List example (Calculate new weight by subtracting tare weight from net weight)

LD weigh_command
JMPC WEIGH_NOW
ST ENO
RET
WEIGH_NOW: LD gross_weight
SUB tare_weight