SourceEndTime Property
Description
In the case of online tags and archive tags ("ProviderType" = -1), it defines the stopping time
of
the time range of a trend referenced via "Index" and to be displayed in the trend window. In
the case of modification of "SourceEndTime", impermissible combinations with other attributes
for data connection could be created. Therefore, before modifying "SourceEndTime", the
immediate acceptance of the changes must be prevented using "FreezeProviderConnections".
See also
WinCC Function Trend Control (before WinCC V7) (Page 267)
ScreenItem Object (Page 134)
SourceNumberOfUAValues Property
Description
For values from the user archives ("ProviderType" = -2) it defines the number of values which
should be loaded from the user archive for a trend referenced via "Index". In the case of
modification
of "SourceNumberOfUAValues", impermissible combinations with other attributes
for data connection could be created. Therefore, before modifying
"SourceNumberOfUAValues", the immediate acceptance of the changes must be prevented
using "FreezeProviderConnections".
See also
WinCC Function Trend Control (before WinCC V7) (Page 267)
ScreenItem Object (Page 134)
SourceNumberOfValues Property
Description
The "Index" property references a trend. In the case of online tags and archive tags
("ProviderType" = -1), "SourceNumberOfValues" defines the number of values which should
be displayed in the trend window. Whether the information is evaluated is dependent on the
value of the "SourceTimeRange" property.
In the case of modification of "SourceNumberOfValues", impermissible combinations with
other attributes for data connection could be created. Therefore, before modifying
"SourceNumberOfValues",
the immediate acceptance of the changes must be prevented using
"FreezeProviderConnections".
VBS for Creating Procedures and Actions
1.14 VBS Reference
MDM - WinCC: Scripting (VBS, ANSI-C, VBA)
System Manual, 11/2008,
519