Library version

All libraries have a specific version. This version is inter alia shown in the PLC library repository too.
A global constant contains the library version information:

Global_Version 

VAR_GLOBAL CONSTANT
    stLibVersion_Tc2_SystemCX : ST_LibVersion;
END_VAR

stLibVersion_Tc2_SystemCX: version information of the Tc2_SystemCX library (type: ST_LibVersion).

To compare the existing version to a required version the function F_CmpLibVersion (defined in Tc2_System library) is offered.

Library version 1:

All other possibilities known from TwinCAT 2 to query a library version are obsolete!