To create a Trending, choose from add button Trending. When you create a new Trending, you will see the Trending configuration in the Detail View.
Trending an item is how often or how frequently has this item been used. Trending is used later on in Chart to give a graphical representation of this Trending.
The following picture shows the default form to create a trending.
| Field | Description | |
|---|---|---|
| Enabled | Enable (default) or Disable the Eventdisable the trending. A disabled trending does not log any values until it is enabled again. | |
| Name* | The name of the Trending trending (Mandatorymandatory). | |
| Description | Trending description. | |
| Item * | Select an item form Item treefrom the item tree. The trending logs the values of the items. | |
| Type * | Aggregation | Enable Trending AggregationType of the Trendingtrending (Mandatory) |
| Interval | Time interval in Second | |
| Max age | Trending max age in Days | |
Scaling | Enable scaling | |
| Min-Max Validation | Determine the allowed Max and Min values | |
| Time program | Time range | |
| Graph | Graph type | |
| Range | Determine the Range of the Trending | |
| Color | Trending color | |
. All: Log all value changes of the item. Average: Log the average value of the item. COV: Log the value of the item when it changes. Delta: Log the delta (difference) of the item's value. Max: Log the maximum value of the item. Meter sampling: Log data in a predefined interval between 5 minutes and 1 hour. Min: Log the minimum value of the item. Pulse: Log the number of value changes of the item. Sampling: Log data in a definable interval. Depending on the selected type additional form fields may appear. | ||
| Max age [days] | Max age of trending data in days. 0 (default): Ignore age of data. Select a number how many days to keep the data of the trending. Older data will be deleted. | |
Interval [s] Interval [min] | Time interval in seconds. Time interval in minutes. | |
| COV type | Absolute (default): Defines the threshold value as absolute value. Percentage: Defines the threshold value as relative value. | |
| Threshold | Log data in the trending when the change of value is grater than the threshold. | |
Scaling | Disabled (default): scaling is turned off. Enabled: scaling is turned on and a scaling function appears for configuration. | |
| Min-Max Validation | Disabled (default): Validation is deactivated. Enabled: Validation is activated. Values outside the min-max range are ignored and not logged to the trending. Additional form fields appear. | |
| Min allowed value | Minimum value. | |
| Max allowed value | Maximum value. | |
| Time program | Disabled (default): Time program is deactivated. Enabled: Time program is activated. The trending logs data in the period defined by Start date/time and End date/time. | |
| Start date/time | Start of time range. | |
| End date/time | End of time range. | |
| Chart | Select the graphical presentation of the trending data. | |
| Range | Select the default range to view in chart view: Day, Week, Month, Year, Custom. | |
| Color | Trending color. | |
| Y axis scaling | Dynamic (default): The system will define the best scaling depending on the values. This is a relative representation of the values. 0-based: All trending values appear in an absolute representation. | |
| Y axis label | Label of the y axis. | |
| Aggregation | Enabled (default): Aggregated values appear in the chart. The aggregated value is the average value for a certain period. Disabled: all values appear in the chart - without aggregation. |