Omron NX-ID - Page 141

5 - 11
5 I/O Refreshing
NX-series Digital I/O Unit User’s Manual (W521)
5-2 I/O Refreshing Methods
5
5-2-4 Free-Run Refreshing
I/O refreshing
of the NX bus
Digital Input Unit A
Digital Input Unit B
(d) Interval of the timing to read inputs is not constant.
Timing to read inputs for each Unit is not simultaneous.
ON/OFF response time
Input filter time
ON/OFF response time
Input filter time
Timing to
read inputs
(c)
(b)
(a) I/O refreshing for NX Units
Set inputs
Read inputs to the Unit
Input refreshing Output refreshing
Inputs
Digital Output Unit A
Digital Output Unit B
(d) Interval of the timing to refresh outputs is not constant.
Timing to refresh outputs for each Unit is not simultaneous.
ON/OFF response time
ON/OFF response time
Timing to
refresh
outputs
I/O refreshing
of the NX bus
(a) I/O refreshing for NX Units
(b)
(c)
Refresh outputs
Set outputs
Input refreshing Output refreshing
Outputs