Earlier TwinCAT 3 versions are available upon inquiry with the Support department.
|TwinCAT 3.1 – eXtended Automation Runtime (XAR)||3.1.4022.27||
The TwinCAT3 Runtime represents the runtime environment, which consists of various components:
The individual options can be activated using licenses.Documentation
|TC1000 | TC3.1 ADS||3.1.4022.27||
The TwinCAT Automation Device Specification (ADS) is the medium-independent protocol for the reading and writing of data and for instruction transmission within TwinCAT.Documentation