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
VAR_INPUT
stVersion : ST_LibVersion;
iMajor : UINT;
iMinor : UINT;
iBuild : UINT;
iRevision : UINT;
END_VAR
stVersion: Version of the existing library (type: ST_LibVersion).
iMajor: Required major number.
iMinor: Required minor number.
iBuild: Required build number.
iRevision: 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
Requirements
|
Development environment |
Target system type |
PLC libraries to include (Category group) |
|---|---|---|
|
TwinCAT v3.1.0 |
PC or CX (x86, x64, ARM) |
Tc2_System (System) |