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6 Analog Input Units
NX-series Analog I/O Units User’s Manual for Analog Input Units and Analog Output Units (W522)
6-5 Function
6
6-5-3 Moving Average
This function averages the inputs if they fluctuate minutely due to noise and so on as shown in the fig-
ure below, and obtains smooth input values.
For the inputs for which the used channels are set to enable, the average value (moving average) of
analog inputs is calculated for a maximum of 32000 μs (conversion time: 250 μs/ point) or 640 μs (con-
version time: 10 μs/point) and it is used as the converted value.
However, if the Analog Input Unit is set to operate with synchronous I/O refreshing, the moving average
function does not operate regardless of the set value of the input moving average time.
The processing contents in the Unit are shown below as an example, in which an NX Unit with a con-
version time of 250 μs/point is used, 4 points are enabled and the input moving average time is set to
4000 μs.
At the initial calculation, the initial data is stored in all moving average buffers to perform the moving
average processing.
6-5-3 Moving Average
Purpose
Details on the Function
Analog input value
Time
Actual input
Input after averaging processing
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