10.2.5 Log Trend

Log Trend records data and displays it as a graph. You may display the pen individually. The ability to store the data as a CSV file is possible.

Note: Historical mode is not supported.

Configures the background color of the Trend object. The background indicates the object area except for the data display and control bar.

Item	Description
Color	Selects the object’s background color. You can select one from the 98 colors.

Item

Description

Back. Color

Selects the graph’s background color. You can select one from the 98 colors.

Initial Draw Type

Selects the method of drawing a graph at the beginning.

If you select the ‘Fixed Pen’ option, the new data will be updated on the side of the display base (right or left).

If you select the ‘Moving Pen’ option, the new data will be updated at the end of the latest pen’s location.

Both options will draw the same graph.

In this tab, you can assign the tags to monitor in the Trend object. You may assign a maximum of 16 tags.

Item	Description
Tag Name	Assign a tag name to monitor. You can manually enter the tag name in the field or select the number button on the left to bring up the [Pen] window.
	Addr	Assign the device address to be monitored. Select the data type and I/O device then press the button to configure the detailed address.
	Tag	Assign the tag to be monitored. You can manually enter the tag name or press the button to select the tag.
	Comment	Enter the detailed comment of the pen. This field must be filled in. The comment will be used instead of the tag name in the object’s legend.
	Min Value	Enter the minimum value which will be displayed on the graph. If you do not enter a value, this field will be set as the minimum value of the tag.
	Max Value	Enter the maximum value which will be displayed on the graph. If you do not enter a value, this field will be set as the maximum value of the tag.
	Pen Color	You may set a pen color, from one of our 98 colors.
Color	You can set a pen color. You can choose one of the 98 colors.

Item	Description
Display Grid	Shows or hides the grid.
X-Axis Grid No.	Assign the number of grids on the X-Axis. You can assign from 1 to 99 grids.
Y-Axis Grid No.	Assign the number of grids on the Y-axis. You can assign from 1 to 99 grids.
Color	You may select the color of your grid from one of the 98 colors provided.

Item	Description
Display Min. Max. Value	Shows or hides the min/max value on the Y-Axis.
Size (Pixels)	Configures the size of the text displayed on the Y-Axis. You may assign the value from 0 to 1024.

Item	Description
Display Min. Max. Value	Shows or hides the min/max value on the X-Axis.

Item	Description
Buffer	Assign the number of data to be displayed on the object. Each pen’s data will be displayed according to the value assigned in this field. You may assign the value from 2 to 800.
Sampling	Indicates the sampling method. If you select ‘Periodic’, the data will be updated according to the assigned sampling interval. If you select ‘Trigger’, the data will be updated when the assigned tag value changed from zero to a non-zero value.
Sampling Interval	This field will be enabled when you select the ‘Periodic’ option. The interval unit is 100ms and you may assign a value from 1 to 65535.
Trigger Tag	This field will be enabled when you select the ‘Trigger’ option. You may assign a tag or an address that will cause operation. Press the button to configure the detailed address or browse the database for a tag.
Screen Control Tag	Assign a tag to control the Log Trend. 0: Allows data logging and initiates trend operation. 1: Stops data logging and ceases trend operation. 2: Initializes the data logging and trend operation. The data logging and trend operation will cease after the initialization.
Data Point	Configures the size of the data point. You may assign the value from 0 to 1024.
Using Multi-Channel	Select this option to individualize the graph pen by pen. The topmost graph displays the data of pen 1.
Draw Border	Shows or hides the border of the graph.