Language features in upcoming TwinCAT 4026 release

[klauer]

https://www.beckhoff.com/en-us/products/automation/twincat/twincat-3-build-4026/

Some relevant ones might include:

keyword: ABSTRACT for abstract function block/method/property definition
ENUMs available as strings in the PLC
exception handling via TRY-CATCH
conditional compilation available in declaration part (in addition to implementation part)
multi-line support in pragma declarations
optional storage format Base64 for graphical PLC objects

Will need code examples. If you find more details about the build - specifically structured text-related changes - please feel free to add a comment here.

[engineerjoe440]

Here are some resources that are related to CODESYS in regards to TRY/CATCH:

• https://help.codesys.com/api-content/2/codesys/3.5.14.0/en/_cds_operator_try_catch_finally_endtry/
• https://stefanhenneken.net/2019/07/29/iec-61131-3-exception-handling-with-__try-__catch/

And some interesting information on the ABSTRACT keyword (seems pretty general)

• https://www.plccoder.com/abstract/