Displaying Logging Data in Trend Graphs

Displays collected logging data in a Trend Graph. You can set up the display method for logging data with the Trend Graph object properties.

[Channels]

The maximum number of channels (number of lines) that can be displayed on a Trend Graph object is 32.

[Full]	The channels are plotted on the entire graph area.
[Divide]	The channels are plotted on the divided graph area.

[Normal]	The latest data is added to the graph right. When the graph line reaches the limit of the display area, the graph is scrolled.
[Pen Recorder]	The latest data always appears at the right edge of the display area.

80%
20%

Display both historical data and current data.

1: Historical data

2: Current data

You can type your own Date/Time format.

To change the Date/Time format:

Note:

For information on Date and Time format, see the following.

Depending on the status of data, an icon may appear or a part of the graph color changes to gray.

1: Communication error occurred

2: Communication recovered

3: Power failure or there is an interlock

Displaying a large amount of data may slow down the updating of trend graphs and may degrade the performance of the runtime itself.

You can improve trend graph display performance by considering the following.

Reduce the number of data displayed in the trend graph.

Example 1: Reduce the number of channels displayed.

Example 2: Extend the data collection period.

Reduce the size of trend graphs drawn on the screen.

When possible, use internal variables rather than external variables.

When using array variables, reduce the number of array elements.

Reduce the maximum number of logging data records.

Clear the logging data.