Visualization of trends can be vital when monitoring your system. Trends allow tag values to depict certain patterns that may be dangerous. For trend correct operation, the recording of current and previous values is needed. To enable historical data loading, please go to the settings page. The displayed data are loaded from the inner memory of your device. You can easily present your online or historical data in the form of a time trend. All defined trends can be found in menu Trends.
There are two possible ways how to visualize trends:
- Online – data is shown starting from the current value
- History – data is shown from a certain entered date
Time range showed in a trend can be easily changed in the bar bellow the actual graph. Drag the slider to change the time range shown (from 1 minute up to 1 year)
Setting custom time interval
When you click on a time interval on the right, you will be presented with a dialog enabling you to set up custom time interval for viewing.
Switch to the history mode is done by clicking on the timer icon in the lower left corner.
In this mode, you can specify a date range in which data will be shown – click on a date to set:
By clicking on the left and right arrows, it is possible to change the date in accordance with an already set Time range. Clicking on the very left arrow will show first records available, clicking on the very right icon will show the latest records available. Again, by clicking on the time interval on the right, you will be presented a dialog enabling you to set up a custom viewing time interval.
- TIP: The maximum of 10 000 values can be shown in one trend at one time. If there is more than 10 000 values in a selected Time range, the system will ask you to reduce the current Time range.