IEC 61131


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IEC 61131

A family of programming languages for programmable logic controllers (PLCs). Of the three graphical and two textual languages, ladder logic (see example below) was the first language and widely used. IEC 61131 was previously known as IEC 1131. See PLC.
Graphical

 ladder logic
 function block diagram
 sequential function chart


 Textual

 structured text
 instruction list



The following example of ladder logic shows how logical AND and OR gates are diagrammed. In this case, x = a AND (b OR c).

   ---[ ]-----|--[ ]--|-----( )---
       a      |   b   |      x
              |       |
              |--[ ]--|
              |   c   |
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The company's flagship product ISaGRAF is fully compliant with both IEC 61499 and IEC 61131 industrial standards, as confirmed by TouV Rheinland, and can be used to build a variety of automation products including embedded ocontrollers, PAC, PLC, DCS, RTU, CNC and motion controllers.
3S-Smart Software Solutions is the manufacturer of CODESYS, the leading hardware independent IEC 61131 development system and run-time software used in factory automation systems for system control, fieldbus connectivity (such as EtherCAT), motion control and safety.
Control software can be developed using IEC 61131 standard languages, or a proprietary Festo tool called FST4 which offers a very simple-to-learn ladder logic system, or a statement-based programming approach with high level commands such as IF, THEN and ELSE.
KW-Software is the specialist for the integration of IEC 61131, SAFETY (IEC 61508 up to SIL3), PROFINET, .
Built-in IEC 61131 PLC functionality means that in many instances, the need for an external controller is eliminated with savings in control panel real estate and money.
AIS) is an ISO 9001:2008 certified supplier and manufacturer of PC-based HMI touch panels equipped with Windows Embedded, which gives software engineers the flexibility to develop using the IEC 61131 programming languages to help manufacturers reduce cost, improve quality and improve time to market for industrial automation and control solutions.