CODESYS

A vendor-independent IEC 61131-3 development environment used as the programming front end for a very large number of PLCs and drives. Knowing CODESYS transfers across a lot of hardware, which is exactly why it exists.

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Protocols it speaks

Protocol	Direction	Notes
opc-ua	bidirectional	Standard integration for exposing controller state.
modbus-tcp	bidirectional	Standard.
canopen	bidirectional	Standard.
ethercat	bidirectional	Supported as a fieldbus.

What to watch for

A shared environment does not mean portable projects. Hardware configuration, libraries and safety functions remain vendor-specific.

Typical use

Programming machinery controllers from many different manufacturers
Automation work where the hardware choice is not fixed

Sources

CODESYS — CODESYS Group primary

Understand the mechanism

How software talks to software How it all runs together

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