MICRO-EPSILON C-Box/2A, Руководство по эксплуатации

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Page 32
Setting Controller Parameters
C-Box/2A
Filter / averaging in the sensor or controller
Several filter types are available for the measured values. Filtering prevents the noise of the signal and en-
sures better resolution
, see 6.5.1.
Moving average
The arithmetic mean value M
gl
is generated and output via the selectable filter width N of consecutive mea-
sured values.
MV (k)
k=1
N
N
M =
gl
MV = measured value,
N = averaging value,
k = continuous index (in the window)
M
gl
= average value or output value
Each new measured value is added, and the first (oldest) value is removed from the averaging (from the win-
dow). This produces short response times for measurement jumps.
Example : N = 4
... 0, 1, 2, 2, 1, 3
2, 2, 1, 3
4
= M (n)
mov
... 1, 2, 2, 1, 3, 4
2, 1, 3, 4
4
= M (n+1)
gl
Measured values
Output value
i
Moving average in the controller C-Box/2A allows only potentials of 2 for N. The highest averaging value
is 512.