YOKOGAWA FA-M3 VITESSE F3CX04-0N, User Manual

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C2-16
IM 34M06H63-01E 1st Edition : July, 2003-00
C2.10 Input Filtering
The input filtering function removes noise from input signals.
It is especially useful to remove high frequency noise from flow rate or pressure signals.
It performs 1st order delay calculation for filtering.
As shown in Figure C2.6, more noise is removed when a larger time-constant is specified.
Use the input filtering function in a noisy environment when corrections must be
performed constantly.
Beware that a time-constant that is too large may result in a distorted signal waveform.
Actual input
signal
When a small time-
constant is specified
When a large time-
constant is specified
Figure C2.6 How Input Filtering Affects Input Signal
Table C2.14 Input Filter Parameter
Data Position Number
Symbol Description Unit Data Range Default Value Attribute Stored
CH1 CH2 CH3 CH4
172 372 572 772 FL Input filter Second 0: OFF; 1-120 seconds 0 RW 