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.