pytwincatparser 0.5.4

TwinCAT PLC file parser using xsdata

pytwincatparser

A Python package for parsing TwinCAT PLC files (TcPOU, TcDUT, TcIO, TcPlcProj, TcGvl, TcIO).

Description

This package provides tools to parse and work with TwinCAT PLC files. It uses xsdata to handle XML parsing. Be aware, that this is a python lib written by a beginner with help of AI assisted programming. My main work task is to design and program industrial machines, not develop python programms!

Features

• Parse TwinCAT PLC files (.TcPOU, .TcDUT, .TcIO, .TcGvl, .TcPlcProj)
• Load the twincatfile in python dataclasses
• parse variable blocks
• parse documentation
• parse dependencies

Installation

pip install pytwincatparser

Usage

_strategy: BaseStrategy = None
_collected: dict[str, Objects] = {}

# for now only "twincat4024" strategy is allowed
if config.default_strategy is not None:
    strategy = get_strategy(config.default_strategy)
else:
    strategy = get_default_strategy()

# set the loader with the right strategy
_strategy = strategy()
_loader: Loader = Loader(loader_strategy=_strategy)

# load every file
for path in paths:
    tcobjects = _loader.load_objects(path=path)
    # for every found object
    for tcobject in tcobjects:
        # get identifier (fb_main.Do_This) and check if such a object is not loaded already
        if not tcobject.get_identifier() in _collected:
            _collected[tcobject.get_identifier()] = tcobject

Requirements

• Python 3.11
• lxml >= 5.3.0
• xsdata[lxml] >= 24.12

License

MIT

Todo

• Add support for return values of methods and functions
• Add support for specifier like CONSTANT and PERSISTEN in Variable blocks