8-11 Input Filter; Function Applications And Overview; Details On The Function - Omron Sysmac NX Series User Manual

8 Functions

8-11 Input Filter

8-11-1

Function Applications and Overview

This function prevents data changes and unstable data if the input bits of the digital input signal that is
used as trigger input are unstable due to chattering or noise.
8-11-2

Details on the Function

Read the inputs at a 1/4 interval of the input filter time. When all the inputs are ON or OFF, the input
values turn ON or OFF.
This prevents data changes and unstable data.
The function works for each trigger input channel of the High-speed Analog Input Units.
Operation when the input turns from OFF to ON (ON filter)
Value of input
terminal
Input value
Operation when the input turns from ON to OFF (OFF filter)
Value of input
terminal
Input value
You can use this function to set the input filter value for each channel.
Set the input filter values in the Unit operation settings. The settings are shown in the following table.
8 - 48
Input filter time
1 2 3 4
ON
OFF
ON OFF OFF ON
Input value is OFF
because all the
inputs are not ON
in the four times of
ON
reading.
OFF
Input filter time
1 2 3
ON
OFF
OFF ON OFF OFF
ON
OFF
NX-series Analog I/O Units User's Manual for High-speed Analog Input Units (W592)
Input filter time
1
ON ON ON ON
4
Input value is ON
because all the inputs
are not OFF in the
four times of reading.
2 3 4
Input value is ON
because all the inputs
are ON in the four
times of reading.
Input filter time
1 2 3 4
OFF OFF OFF OFF
Input value is OFF
because all the inputs
are OFF in the four
times of reading.