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Microsoft Excel Data Exchange Functions
PlantScape Server and Client Configuration Guide 477
NAPI_rGetVal_History
Retrieves the value of the PV history type of a point.
Example To retrieve the history value at history offset 5 of parameter H5SF (Fast History) of
point PNTANA1 from server HSSERVA:
=NAPI_rGetVal_History("hsserva",NAPI_rGetPntNum("hsserva","p
ntana1"),46,5)
Server Name of the PlantScape server from which data is
retrieved.
PointNumber Point number of the point. See “NAPI_rGetPnt_Num”
on page 474 for details of how to obtain the point
number for a point ID.
PointParameter The point parameter of interest, for example, PV.
Refer to Table 8.1, “Summary of Point Parameter
Types,” on page 134 for a list of parameter types.
HistoryOffset Starting history interval from now.
plscpcg.book Page 477 Monday, May 28, 2001 10:11 AM
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