history-HistoryPointListItem

This component is available in the history module. Each HistoryPointListItem is linked to a single history extension and is configured in the Add Item dialog box or in the HistoryPointListItem property sheet. HistoryPointListItem configurable properties include the following.

History Extension

The Ord to the History Extension of the Control Point you wish to view. This MUST be the History Extension and NOT the Control Point or its corresponding History Component.
Display On Startup

Indicates whether or not to automatically display the chart for this item when the view first comes up.
Start Time

Indicates how much of the collected history data you wish to view. The time that is entered in this property will be subtracted from the current time to get the initial history data.
The following conditions apply:
- If no data is found within the given Start Time the LAST collected value is retrieved for the item.
- If the Start Time is 0 hours 0 minutes ALL collected history values is retrieved for the item.
Sample Rate

The rate at which to sample the "live" data.
- Auto
  
  This value follows the interval defined in the history extension configuration
- Fixed
  
  This value follows a defined interval that is specified by the user in terms of hours, minutes, and seconds.
- Cov:
  
  This value specifies that updates are plotted whenever there is a change of value.
Min Value Range

The minimum value to display on the value axis.
- Auto
  
  This value uses the minimum value from the data collected.
- Fixed
  
  This value uses the value specified by the user. This only applies to numeric points (Booleans and Enums do not use this property).
Max Value Range

This value is the maximum value to display on the value axis.
- Auto
  
  This value uses the maximum value from the data collected.
- Fixed
  
  This value uses the value specified by the user. This only applies to numeric points (Booleans and Enums do not use this property).
If Min Value Range and Max Value Range are Fixed AND have the same values charts may share the value axis. If these two conditions do not exist, additional value axes may be added to the chart, as needed.
Line Color

This value specifies the desired color for the plot line.
Pen

This value specifies the line-weight and type to use for the plot line.
Item Name

This value specifies the name that is displayed on the view. This name must be unique within the list of items.

Refer to HistoryPointList and About the Live History Chart View for more information.