Function; List Of Digital Input Unit Functions - Omron NX-ID User Manual

6-4

Function

This section describes the Digital Input Unit functions.
Refer to the specifications of each model in A-1 Data Sheet on page A-2 for details on the functions.
6-4-1

List of Digital Input Unit Functions

Function name
Free-Run Refreshing
Synchronous I/O Refresh-
ing
Time Stamp Refreshing
Input refreshing
with input changed
time
Input Filter
NX-series Digital I/O Unit User's Manual (W521)
Description
With this I/O refreshing method, the refresh cycle of the NX
bus and the I/O refresh cycles of the NX Units are asynchro-
nous.
With this I/O refreshing method, the timing to read inputs or to
refresh outputs is synchronized on a fixed interval between
more than one NX Unit connected to a CPU Unit.
In addition, with this I/O refreshing method, the timing to read
inputs or to refresh outputs is synchronized on a fixed interval
between more than one NX Unit on more than one Slave Ter-
minal.
With this I/O refreshing method, the NX Units record the DC
times when inputs change or perform outputs at specified DC
times. These times are not synchronized to the NX bus refresh
cycles.
Data exchange between the NX Units and the CPU Unit and
data exchange between the NX Units and the EtherCAT Cou-
pler Unit are performed cyclically on the NX bus refresh
cycles.
With this I/O refreshing method, the Input Units record the DC
times when inputs changed.
This function eliminates the chattering or the noises from input
signals. It is used to prevent the error reading due to the
noises. You can set the filter time constant.
6 Digital Input Units
Reference
5-2-4 Free-Run
Refreshing on
page 5-8
5-2-5 Synchro-
nous Input
Refreshing on
page 5-12
5-2-7 Time Stamp
Refreshing on
page 5-19
5-2-8 Input
Refreshing with
Input Changed
Time on page 5-20
6-4-2 Input Filter
on page 6-14
6 - 13
6