Back to Items IndexItem - Batch Average
Please refer to Adding a New Item for specific information on how to add an ITEM and how to change its properties.
Description
The Batch Average ITEM calculates the average value of an input data.
This is a true moving average calculation.
The maximum number of data points for the average is calculated by dividing the TASK "Scan Time" by the averaging time.
During operation the value of the data points are rotated as the new data is added and the oldest data is discarded.
When starting, the number of data points starts at 0 and builds slowly with each scan until the maximum number of data points is reached.
The averaging calculation is the sum of all of the data points divided by the total number of data points.
The Batch Average ITEM will only work if the Batch is running.
Properties
| Class Name | A unique name for this item. The class name is display only and cannot be changed. |
| Name | Enter a meaningful name for this Item so that you, and other people, will easily recognize what it is for. |
| Enabled | No - The ITEM is not enabled and will not update
when its TASK updates Yes - The ITEM is enabled and will update when its TASK updates. |
| Input Value | Select an ITEM that has the value to be used in the logarithm equation. |
| Av. Over (Mins) | Enter in the number of minutes over which to average the Input Value. |
| Batch Run | Select an ITEM that has the value for the Batch
Run. If the Batch is not running then the Batch Average ITEM will be reset and its value will equal zero. 0 = Batch is not running. 1 = Batch is running. |
| Freeze Average | Select an ITEM that has the value for 'Freezing'
the average calculation. This is most often used during equipment downtime when the value of the 'Input Value' is not to be included in the average calculation. 0 = Continue average calculation. 1 = Freeze average calculation. |