Options on the General tab of the Trend Object Properties dialog box
The following table shows the options on the
General
tab of the Trend Object Properties
dialog box.Options | Descriptions |
|---|---|
Chart style | Specify the plotting style of the chart. A trend either plot values against time (Standard) or against a selected pen (XY plot). |
Standard | Select this option to plot each pen against time in a standard line chart. |
XY plot | Select this option to plot each pen against a selected pen, which serves as the X-axis. If you select this option, select a pen for the X-axis from the X-Axis pen box. |
X-Axis pen | Specify which pen serves as the X-Axis in an X-Y plot. |
Chart update mode | Specify how often the chart updates with new data. |
Automatic | Select this option when you want the trend to update itself at regular time intervals. |
Refresh Rate | In the Automatic mode, the Refresh Rate controls how often the trend acquires data.The Refresh Rate range is 50 milliseconds - 596 hours. |
On Change | Select this option when you want the trend to update itself as data values change. This mode is useful for data that changes rapidly. In the On Change mode, real-time data updates in the trend whenever data changes by more than a certain amount, or after a specified interval. |
Heartbeat | Specify the maximum amount of time in milliseconds between updates when a chart is updating on change. If the value of a pen has not changed within the amount of time specified, the chart shows the current value. Set the heartbeat rate to 0 to disable the heartbeat. |
Deadband | Specify a percentage, from 0% to 100% of the actual value, by which a value must change before the chart shows the next value. |
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