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D2000 KomAPI - interface description

Protocol dynamic link library (.DLL) exports a set of functions, which are called by the process D2000 KOM. The list of all the exported functions is shown in the following table with the brief description.
On Linux platform, the dynamic library extension is different (.so), and the function names are without underscore and size specifications (e. g. Init instead of _Init@4).

Function name Requirement Meaning
_Init@4 Required The function called after DLL dynamic import.
_ReadAllPoints@4 Optional (recommended) Reading of values of all station I/O tags.
_ReadStoredData@28 Optional Reading of historical values of station I/O tags.
_ReadPointValue@8 Optional Reading of I/O tag value.
_WritePointValue@16 Optional Writing of a new I/O tag value.
_InitStation@4 Optional Definition of new station parameters.
_DeleteStation@4 Optional Station deleted.
_TimeSynchroStation@4 Optional Station real time synchronisation.
_InitPoint@12 Optional Definition of new I/O tag parameters.
_DeletePoint@4 Optional I/O tag deleted.
_ConfigDone@4 Optional Calling the definitions of station and its I/O tags is done.
_PointsApplyBack@8 Optional Response to calling the call-back procedure PointsApply.
_StationsApplyBack@8 Optional Response to calling the call back procedure PointsApply.
_ExitProc@0 Optional Called when stopping D2000 KOM.
_ExitProcWithLnPar@4 Optional Called when stopping D2000 KOM.
_RdStatusChanged@4 Optional Called when switching the redundancy or changing the instance of D2000 KOM.

Note
All the used KomAPI functions and procedures (including call-back functions and internal tasks) require the Stdcall call convention on Windows platform.

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