6 Analog Input Units
6 - 18
NX-series Analog I/O Units User’s Manual for Analog Input Units and Analog Output Units (W522)
The settings are made by the "input moving average time (
μ
s)".
The input moving average time can be set for each input.
The input moving average time is:
The number of data items for which the moving average is processed x analog conversion time (num-
ber of channels used x 250
μ
s)
Note that if 0 is set, the moving average processing is not performed.
[Setting example of input moving average time]
When the number of channels used is to be set to 4 and the number of sampling data items to 4:
Input moving average time = 4 x (4 x 250
μ
s) = 4000
μ
s (set value: 4000)
Moving average
calculation
(Initial)
Moving average
calculation (2nd)
Moving average
calculation (3rd)
Moving average
calculation (4th)
Moving average
calculation (5th)
Converted value
=
(D1
×
4) /4
Converted value
=
((D1
×
3)
+
D2) /4
Converted value
=
((D1
×
2)
+
D2
+
D3) /4
Converted value
=
(D1
+
D2
+
D3
+
D4) /4
Converted value
=
(D2
+
D3
+
D4
+
D5) /4
Time
D1
D2
D3
D4
D5
Actual analog
conversion data
Analog conversion time
(number of channels used
×
250 μs or 10μs )
Initial
data
Initial
data
Initial
data
Initial
data
2nd
time
data
Initial
data
Initial
data
Initial
data
2nd
time
data
Initial
data
3rd
time
data
Initial
data
2nd
time
data
Initial
data
3rd
time
data
4th
time
data
2nd
time
data
5th
time
data
3rd
time
data
4th
time
data
Moving average processing buffer
Summary of Contents for NX-AD series
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