Omron NX-AD series User Manual page 111

I/O refreshing synchronization
The longest AD conversion time
is within one cycle.
Offset between
Sync0 and timing to
read inputs
This time is automatically
calculated by the Sysmac
Studio.
I/O refreshing
of the NX bus
Digital Input
Unit A
Digital Input
Unit B
Analog Input
1 2 3 4
Unit A
Analog Input
Input 1 Input 2
Unit B
Settings
Add NX Units that support synchronous I/O refreshing to the CPU Unit configuration or Slave Terminal
configuration.
After you add the NX Units, set an I/O refreshing method depending on the connected CPU Unit or
Communications Coupler Unit so that these NX Units operate with synchronous I/O refreshing.
Refer to 5-2-2 Setting the I/O Refreshing Methods on page 5-7 for the setting procedure of the I/O
refreshing method.
NX-series Analog I/O Units User's Manual for Analog Input Units and Analog Output Units (W522)
Sync0
Input refreshing
Output refreshing
Constant
ON/OFF response
time
Input filter time
ON/OFF response
time
Input filter time
1 2 3 4
AD conversion
time for all Units.
Input 1
AD conversion
time for all Units.
AD conversion starts
(a) All Input Units that support synchronous
input refreshing read their inputs simultaneously.
(c) Interval of I/O refreshing
is not constant.
(b) The Communications Coupler Unit
reads the data that is read by the
Unit at I/O refreshing.
Sync0
Constant
Constant
(f) Set inputs
Input 1
Input 2
(f)
5 I/O Refreshing
(d) Interval of Sync0 is constant.
Not constant.
Sync0
Constant
(e) Constant
1 2 3 4
Input 2
(f)
5
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