Attribute:

Default:

Purpose:

Value Suffix

Enabled

Controls whether a suffix is added to values read from the active Data Source to indicate whether the data returned is questionable (i.e. neither good or bad).

Supported Suffixes are:

• (I) - the Data Source returned an Interpolated value

• (U) - the Data Source returned a value marked as 'Uncertain'.

• (M) - missing data for Radar plots in average mode.

• (P) - the Data Source returned a predicted value.

Note:  For interpolated data, the method of Interpolation may be either by, or by some more complex method.  The method used is down to the specific OPCServer implementation.

Note:  The specification of what constitutes Uncertain OPC data is server specific.

Boolean True as +1

Enabled

Based on the OPC foundation specification it is valid for a Boolean to use -1 to represent True.  This can however look odd when trending boolean so stPro can mask Boolean values of -1 and display 1 (the traditional view of True) instead.

Note:  The conversion of -1 to +1 (True) is a display characteristic only and thus exported data will contain the 'raw' values.

Ignore Missing Samples

Enabled

Control whether missing data should be included when calculating the values for Compressed data.

Tip:  This addresses the situation where data periods appeared to be blank when zoomed out even though there was data present when zoomed in.