Calculates the mean of 4 inputs to the block.
The values at the four analogue AI1 to AI4 are evaluated, then added and divided by the number of used inputs. Then the mean value is output at AQ.
If an input of the function block is not connected then it is not used for the calculation.
In the example below the average temperature of the room is calculated. This is useful if you have a large room that you want to have two sensors in for a more accurate temperature calculation.