Specify any optional SOURCE values after the SOURCE Mandatory Value in a TrendSpec definition. Remember to include a comma at the end of the mandatory value before listing any of these optional values. Include a comma between each optional value’s definition.
The optional SOURCE values are equivalent to the properties that you can specify using the Edit Source window on a Pre-Configured Trend. For further information on these properties, see Configure a Trace.
The optional values that you can specify within the SOURCE section are:
| SOURCE Optional Values | ||
|---|---|---|
|
Identifier |
Value Type |
Comments |
|
AggregateId (Only applicable if the TRACE’s <Data Mode> is ProcessedHistoric.) |
Long |
Use to specify the algorithm that ClearSCADA uses to process the source’s historic data. The values that you can specify vary, depending whether the TRACE’s Interval identifier is set to PerPixel or a specific time period (see Supported AggregateId Values).
Example:
AggregateId =10 |
|
Multiplier |
Real |
Use to define the amount by which ClearSCADA multiplies the data values. The scaled values form the source of the trace.
Example:
Multiplier = 1.500000 Also see Enable Users to Specify Which Traces to Include on an Ad Hoc Trend. |
|
XOffset (Only applicable if the TRACE’s <Data Mode> is RawHistoric or ProcessedHistoric.) |
Integer or String |
Use to define a time offset for the trace. If required, use the XOffset to display source values from a different time period to that indicated by the x-axis. Either specify the XOffset as an integer, whereby the value has to be in seconds
Example:
XOffset = 300 or as a string, whereby the value has to be specified in the OPC Time Format.
Example:
XOffset = ‘5M’ |
|
YOffset |
Real |
Use to define the position of the trace values on the y-axis.
Example:
YOffset = 0.200000 Also see Enable Users to Specify Which Traces to Include on an Ad Hoc Trend. |