F_CmpLibVersion

The function F_CmpLibVersion compares the version of the existing library with the required version. Each library has its own version information as a constant of type: ST_LibVersion. The name of the constant has the format: stLibVersion_libraryname.

FUNCTION F_CmpLibVersion: DINT

Inputs

VAR_INPUT
    stVersion   : ST_LibVersion;
    iMajor      : UINT;
    iMinor      : UINT;
    iBuild      : UINT;
    iRevision   : UINT;
END_VAR

Name	Type	Description
stVersion	ST_LibVersion	Version of the existing library (type: ST_LibVersion)
iMajor	UINT	Required major number
iMinor	UINT	Required minor number
iBuild	UINT	Required build number
iRevision	UINT	Required revision number

Return parameter	Version relationship
-1	Your version is lower than the required version.
0	Your version is the required version.
+1	Your version is higher than then required version.

Example in ST:

IF F_CmpLibVersion( stLibVersion_Tc2_System, 3, 3, 8, 0) >= 0 THEN
    (* newer lib ...*)
ELSE
    (* older lib... *)
END_IF

Prerequisites

Development Environment	Target platform	PLC libraries to be integrated (category group)
TwinCAT v3.1.0	PC or CX (x86, x64, Arm^®)	Tc2_System (system)