When you select a tag (with a double click), four items are available: details, history, alarm rules, and active alarms are displayed as shown below. Here, we will check the function and operation of each item. For example, we can review the
Health.Disk.Free or free disk space of a personal PC.
Tag details
The toolbar has buttons for
Save ,
Update (Undo) ,
Reset Aggregate ,
Delete ,
and Export to CSV .
- Save : Saves the updated contents of the changed part in the tag details (changes in the tag details will be invalid if you do not save).
- Update : Reloads the tag information from the server and updates it with the latest information. The tag details information is automatically updated every 3 seconds, but it is used when you want to update at any time. If you change the settings in the tag details, this button will change to Undo .
- Reset Aggregation : If value aggregation is enabled, the aggregated data will be reset. The count returns to 1 and starts counting from the current value.
- Delete : Deletes the tag.
- Export to CSV : Download tag history or details. If you download the history, you can download the tag information for the specified period as a CSV file. If you download the details, you can download the information described in the tag details as a CSV file.
History
To see the past value of the tag, open the history item. Here, the past values are displayed in a graph, and you can perform the operations described later by using the menus on the upper left and right of the graph.
The icons on the upper left of the graph have the following functions.
1. The lock icon disables the enlargement / reduction operation on the graph. This is the default state.
2. Click and drag the graph display area to change it. You can also zoom in / out by using the mouse scroll.
3. Enlarges the area specified on the graph. You can also zoom in / out by using the mouse scroll.
4. Zoom out. Resets the graph to its original state and displays the entire tag history.
5. Download the current state of the graph as a PNG image.
The chart legend (the menu on the right side of the chart) allows you to customize how each plot will appear on the chart.
1. Specify the plot style. You can choose from lines, scatter plots, line scatter plots, bar charts, and area displays.
2. Specify the point style. If a point style is selected for the plot style, the selected point style will be used.
3. Specify the line width.
4. Specify the line style.
5. Specify the filled area. Specifies the area where the fill color is displayed when the plot style is area display. The first option fills between the yaxis origin and the row of data, the second option fills the bottom of the row of data, and the third option fills the row of data.
6. Specify the color of the plot.
7.
Show value on hover enables the option to show the time and value when you move the cursor to a data point on the graph.
Alarm Rules and Active Alarms
Find out about creating alarm rules and alarms that have occurred in the past. You can find out how to use this item in
this document.