5-2
I/O Refreshing Methods
This section describes I/O refreshing methods for the NX Units.
5-2-1
Types of I/O Refreshing Methods
The I/O refreshing methods that you can use between the CPU Unit or Communications Coupler Unit
and the NX Units are determined by the CPU Unit or Communications Coupler Unit that is used.
For the High-speed Analog Input Units, synchronous I/O refreshing as described below is always
used.
I/O refreshing method
name
Outline of operation
Synchronous I/O refreshing
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.
5 I/O Refreshing
5 - 6
NX-series Analog I/O Units User’s Manual for High-speed Analog Input Units (W592)
