Festo CPX-2AA-U-I, Electronic Manual

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4. Analogue input module CPX−4AE−T
4−27
Festo P.BE−CPX−AX−EN en 0503b
The following table shows examples for setting limit values
with parameters. The limit values are specified in 1/10 °C or
°Fahrenheit.
S ettin g of l imit v a l ue = 42° = 42 * 10 = 420
D7 D6 D5 D4 D3 D2 D1 D0
1 0 1 0 0 1 0 0 Channel x, low byte
0 0 0 0 0 0 0 1 Channel x, high byte
S ettin g of l imit v a l ue = −30° = −30 * 10 = −300
D7 D6 D5 D4 D3 D2 D1 D0
1 1 0 1 0 1 0 0 Channel x, low byte
1 1 1 1 1 1 1 0 Channel x, high byte
Tab.4/18: Example: Parametrizing of limit values for channel x
4.4.6 Measured value smoothing by parametrizing
In order to suppress interference, there is the possibility of
digitally smoothing the input data, whereby the degree of
smoothing can be set by parametrizing (see Tab.4/12).
Smoothing is carried out as follows:
by forming the sum of n values,
by subtracting an average value,
by adding the current input value.
The following applies here: the greater n, the more the signal
will be smoothed.