Network variables can be used for data exchange between two or more PLCs without PLC-specific functions.
Network variables are defined by name in the CoDeSys project and automatically exchanged between the PLCs at runtime. To do this, they are summarized in so-called network variable lists. There can be several lists per PLC. Since data is exchanged via broadcast messages, one of the PLCs acts as a sender and the others can receive the data. No PLC-specific functions are necessary, but the variable lists must be absolutely consistent in all PLCs. To support this consistency, the CoDeSys programming system offers the option of exporting a variable list during the generation process and importing it back into the receiving PLC.
With the help of these apps, data can then be exchanged between your device, e.g. B. smartphone or tablet and one or more PLCs. The app takes on the role of a PLC, so to speak.
You can:
- Create, edit, import or export lists.
- Add or remove variables.
- Define the list as reading or writing
The app supports all CoDeSys primitive variables, like:
ARRAY, BOOL, BYTE, DINT, DT, DWORD, INT, LREAL, REAL, SINT, STRING, TIME, TOD, UDINT, UINT, USINT, WORD and DATE
The app only supports UDP protocol.

Have fun using it.