Accessing the dialog
To access the Pen Style dialog for a specific data point, first access the Points dialog and then click the Options column for that data point.
The dialog in detail
Figure 1.
Options dialog
The Options
dialog includes the following elements:
| Element Name | Description |
|---|---|
| Description | This text can be displayed in the legend, providing a short description about the data point, during runtime. When tags are used, the default description is the one configured for the tag. |
| Eng. Unit | This text can be displayed in the legend, providing the engineering unit (i.e., the unit of measurement) associated with the data point, during runtime. When tags are used, the default units are the ones configured for the tag. |
| Lo Limit | When the data point value is below this limit, its pen can be displayed with a different style (e.g., color) during runtime. See Pen Style dialog for further information. When tags are used, the default Low Limit is the Low Alarm value configured for the tag. |
| Hi Limit | When the data point value is above this limit, its pen can be displayed with a different style (e.g., color) during runtime. See Pen Style dialog for further information. When tags are used, the default High Limit is the High Alarm value configured for the tag. |
| Hide Scale | You can configure a tag in this field to control the visibility of the scale (Y axis) associated with this pen during runtime by changing the value of this tag (0=Show ; 1=Hide). |
| Break Interval | Maximum interval between two consecutive points. If
the time between two consecutive samples is higher than this number
(in seconds), the Trend Control assumes that there was no data
collection in this period and does not draw a line linking both
samples. When the X Axis is configured as numeric, the value on
this field represents a numeric scalar value. If the X Axis is
configured as date/time, the value for this field is given in
seconds.
This field has some special values:
|
| X-Axis Offset | Off-set for this data point from the X-Axis scale configured for the object. This option is useful when you want to display data from two or more data points using a different X scale (period of time/value) for each one, so you can compare them. When the X Axis is configured as numeric, the value on this field represents a numeric scalar value. If the X Axis is configured as date/time, the value for this field is given in seconds. |
| Cursor Value | You can configure a tag in this field. During runtime, the trend control updates the value of this tag with the value of the intersection between the data point pen and the vertical cursor (if any). |
| Y-Axis Log Base | Type a tag name or numeric value. When the value is 1, the Y-axis of the trend is displayed on a logarithmic (e.g., 1, 10, 100, 1000) rather than linear scale. |
| Annotation ID | N/A |
| Style Modifier | N/A |