FB_CheckLicense

	If you use OEM licenses make sure you encrypt your boot project! Remember that the license ID queried via FB_CheckLicense in the binary code can easily be found and (with a little effort) manipulated with a hex editor. Therefore, be sure to encrypt your boot project (safest), or at least disguise the queried license ID in the source code as best as possible.

The function block FB_CheckLicense determines the TwinCAT 3 license status for a given license ID.

Inputs

VAR_INPUT
    bExecute     : BOOL;
    tTimeout     : TIME := DEFAULT_ADS_TIMEOUT;
    sNetId       : T_AmsNetId;
    stLicenseId  : GUID;
END_VAR

Name	Type	Description
bExecute	BOOL	The function block is enabled by a positive edge at this input.
tTimeout	TIME	States the length of the timeout that may not be exceeded by execution of the ADS command.
sNetId	T_AmsNetID	AmsNetId (AMS network identifier) of the TwinCAT computer whose license status is to be read. For the local computer an empty string may be specified.
stLicenseId	GUID	License ID

VAR_OUTPUT
    bBusy          : BOOL;
    bError         : BOOL;
    nErrId         : UDINT
    stCheckLicense : ST_CheckLicense;
END_VAR

Name	Type	Description
bBusy	BOOL	When the function block is enabled, this output is set and remains set until a feedback is received.
bError	BOOL	If an error occurs during the transmission of the command, this output is set after the bBusy output is reset.
nErrId	UDINT	Returns the ADS error number when the bError output is set.
stCheckLicense	ST_CheckLicense	Structure with license data

Development environment	Target platform	PLC libraries to include
TwinCAT v3.1.4022	PC or CX (x64, x86)	Tc2_Utilties >= 3.3.24.0