![]() The integration of IEC 61131-3 programming languages with customizable and flexible NI hardware allows the incorporation of specialized I/O such as motion or machine vision capabilities while preserving previous investments through reuse of existing code. The use of standard programming languages has a positive impact on the software life-cycle that includes requirements analysis, design, construction, validation, installation, operation, and maintenance. IEC 61131-3 is vendor independent and very well established in Europe, but gaining popularity in North America and Asia as the programming standard for industrial and process control. The standard defines two graphical and two textual programming languages: ![]() The standard defines basic software architectures and programming languages of the control program within PLCs. The IEC 61131-3 is an international standard for Programmable Logic Controllers (PLCs).
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