...
| Function | Meaning |
|---|---|
| None | No function. |
| Average * | Arithmetical average of all archive object values. |
| W-Average * | Weighted arithmetical average of all archive object values. |
| Integral | Time integral of historical values. |
| Sum | Sum of archive object values. |
| Maximum | Maximum of archive object values. |
| Minimum | Minimum of archive object values. |
| Count | Number of archive object values. |
| Filter | Applying a filter for value storing into the statistical archive. |
| Increment | Increment between values. If the newer value is greater than the older one, then the difference between the values, otherwise the newer value (the function is useful to process counter values that oveflow and start from zero again). |
| Delta | Delta between values. Parameter (Compare value) – weight of impulse. The result will be the impulse multiplied by its weight. Weight of 1 will ensure standard behaviour. |
| EcoAvg | Average of the object values within the elapsed time period (Period parameter in Time parameters tab) according the methodology based on flags of individual values entering the statistic. The same purpose is fulfilled by the function %EcoAveR, that is implemented for eval tags. |
| GT Time (>) | The function calculates the time, during which the value of the historical value was greater than the entered constant (Compare value). |
| GE Time (>=) | The function calculates the time, during which the value of the historical value was greater or equal to the entered constant (Compare value). |
| LT Time (<) | The function calculates the time, during which the value of the historical value was lower then the entered constant (Compare value). |
| LE Time (<=) | The function calculates the time, during which the value of the historical value was lower or equal to the entered constant (Compare value). |
| Maximum in time interval | Obsolete - do not use! |
| Minimum in time interval | Obsolete - do not use! |
| Number of local maximums | |
| Number of local minimums | |
| Sum of positive values | Sum of positive values of the historical value. |
| Sum of negative values | Sum of negative values of the historical value. |
| Average of positive values | Arithmetical average of positive values of the historical value. |
| Average of negative values | Arithmetical average of negative values of the historical value. |
| Sum of increments | Sum of increments for given time interval. If the new value is less than the old value, the increment is 0. Parameter (Compare value) – weight of impulse. The result will be the impulse multiplied by its weight. Weight of 1 will ensure standard behaviour. |
| Time slice** | Object value in given time moments. |
| Sample standard deviation | The function calculates the sample standard deviation of all values of the archive object. |
...
The difference among the functions INCREMENT, DELTA and SUM OF INCREMENTS is shown in the following figures.
In the first case, all three functions are equal to 5 (10-5)
In the second case
- DELTA = 5-10 = -5
- INCREMENT = 5 (because 5 <10)
- ADDITIONAL AMOUNT = 0 (because 5 <10)
In the third case
- DELTA = (10 - 5) + (2 - 10) + (10 - 2) = 5
- INCREMENT = (10-5) + 2 (because 5 <10) + (10-2) = 15
- ADDITIONAL AMOUNT = (10-5) + 0 (because 5 <10) + (10 - 2) = 13
| Kotva | ||||
|---|---|---|---|---|
|
...