Omron NX-IA3117, User Manual

Page: 50 / 342

1 Features and System Configuration
1 - 16 NX-series Digital I/O Unit User’s Manual (W521)
1-4-3 Digital Mixed I/O Units
Function name Description Reference
Free-Run Refreshing 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. 5-2-4 Free-Run
Refreshing
on
page 5-5
Synchronous I/O Refresh-
ing With this I/O refreshing method, the timing to read inputs or to
refresh outputs is synchronous on a fixed interval between
more than one NX Unit on more than one Slave Terminal. 5-2-5 Synchro-
nous Input
Refreshing
on
page 5-9
Input Filter 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. 6-4-2 Input Filter
on page 6-14
Load Rejection Output
Setting A function that performs the preset output operation when the
Digital Output Unit cannot receive output data due to a host
error on the Communications Coupler Unit or an error on the
NX bus. 7-4-2 Load Rejec-
tion Output Setting
on page 7-12
Load Short-circuit Protec-
tion A function in which the output will turn OFF to protect the out-
put circuit when an overload or load short-circuit occurs due to
a failure of the connected external devices. 7-4-3 Load
Short-circuit Pro-
tection
on page
7-18