ReadPointValue
Declaration
unsigned int _stdcall ReadPointValue(struct StationPar * St, struct PointPar * Pt)Parameters
St | Pointer to the StationPar structure. |
Pt | Pointer to the PointPar structure. |
Description
The function ReadPointValue (_ReadPointValue@8 in the Stdcall call convention) is optional and it is called to get the value of defined I/O tag after writing a new value using the function WritePointValue.
Return code
Code | Description |
RQ_OK | Request executed OK. |
RQ_ERR | An error occurred (the device does not communicate or is out of service, or there is any error), the station changes into the state COM_ERR, or HARD_ERR after returning from the function. |
RQ_IGNORED | The function was ignored and the station status is not changed. |
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