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1-3-4 International Standard IEC 61131-3
IEC 61131-3
IEC 61131-3
*1
is an international standard that is initially published in 1993.
• Manufacturer and hardware-independent
• Reusable software components
• Five programming languages for a variety of purposes and skill levels
*1. IEC (International Electrotechnical Commission)
Five programming languages according to IEC 61131-3
• IL (Instruction List): A low-level text language similar to assembly
• LD (Ladder Diagram): A graphical language written in a form similar to electrical circuits
• ST (Structured Text): A high-level structured language similar to Pascal
• FBD (Function Block Diagram):
A graphical language to describe the function as a set of elementary blocks
• SFC (Sequential Function Chart):
A graphical language used to program processes that can be split into steps
The NX1P supports LD and ST.
Adoption of the IEC 61131-3 standard
The adoption of the IEC 61131-3 standard is widespread from Europe and North
America to Asia.
The NX1P support programming languages based on IEC 61131-3. Engineers can be
trained easily thanks to familiar programming languages.
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