Parameter Input Filter Time; Table 38: Input Pulse Durations Depending On The Input Filter Time - WAGO -I/O-SYSTEM 750 Manual

94 Commissioning
8.3.4.1

Parameter Input Filter Time

Configuring the input filter time changes the safe response time!
If you change the Input Filter Time parameter, then the safe response time is
also changed. See "Response Time" section.
The Input Filter Time parameter is used to set the filter time for all digital inputs
of the F I/O module. Setting the filter time to "0 ms" disables the input filter.
Note that the minimum signal duration on a digital input depends on the filter time
set.
With the input filter, signal changes to a digital input are detected by the F I/O
module delayed by the duration of the filter time.
If the signal voltage on the digital input switches from "1" to "0" (signal change
1-0) for a safety requirement (e.g., emergency off requirement), for example,
signal voltage "0" must be present for this input pulse duration.
If the signal voltage is present shorter than the input pulse duration on the digital
input, the signal change is may not be detected by the F I/O module. The
following table indicates input pulse durations depending on the input filter time
set:

Table 38: Input Pulse Durations Depending on the Input Filter Time

Input filter time
[ms]
Input pulse duration
[ms]
Use shielded cables for input filter times under 3 ms!
If you have set input filter times less than 3 ms, you have to use shielded cables
if there is risk of interference (e.g., overvoltage) on the signal lines to prevent
possible passivation of the F I/O module.
Manual
Version 1.4.2, valid from HW/SW Version 01/02
750-667/000-003 4FDI/4FDO 24V/2A PROFIsafe V2 iPar
0 0.5 1 2
19 20 21 24
WAGO-I/O-SYSTEM 750
3 5 10 20
28 36 56 96
50 100 200
216 418 816