Omron Sysmac NX-series, Руководство пользователя

Страница: 190 / 306

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)
1 2 3 4
ON OFF OFF ON
1 2 3 4
ON ON ON ON
Input value
OFF
ON
OFF
ON
Input filter time
Input value is OFF
because all the
inputs are not ON
in the four times of
reading. Input value is ON
because all the inputs
are ON in the four
times of reading.
Value of input
terminal
Input filter time
Operation when the input turns from ON to OFF (OFF filter)
1 2 3 4
OFF ON OFF OFF
1 2 3 4
OFF OFF OFF OFF
OFF
ON
OFF
ON
Input filter time Input filter time
Value of input
terminal
Input value
Input value is ON
because all the inputs
are not OFF in the
four times of reading.
Input value is OFF
because all the inputs
are OFF in the four
times of reading.
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 Functions
8 - 48
NX-series Analog I/O Units User’s Manual for High-speed Analog Input Units (W592)