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5 I/O Refreshing
NX-series Analog I/O Units User’s Manual for Analog Input Units and Analog Output Units (W522)
5-
2 I/O Refres
hing
Meth
od
s
5
5-
2-6 Synchronous Output Re
freshing
Offset between synchronization timing and timing to refresh outputs
This time is automatically calculated by the Sysmac Studio.
(c) Interval of I/O refreshing
is not constant.
I/O refreshing synchronization
The longest DA conversion time
is within one cycle.
(d) Interval of synchronization
timing is constant.
(b)The Communication Coupler Unit refreshes
the output values at I/O refreshing.
Timing to refresh
outputs
Synchronization
timing
Synchronization
timing
1 2 3 4
Synchronization
timing
Constant
Constant
1 2 3 4
Output 1 Output 2
ON/OFF
response
time
DA conversion
time
1 2 3 4
1 2 3 4
Output 2
1 2 3 4
1 2 3 4
Output 1 Output 2
Digital Output Unit A
Digital Output Unit B
Analog Output Unit A
Analog Output Unit B
Not constant.
(e) Constant
Constant
Constant
Output 1
Wait time
Wait time
I/O refreshing
of the NX bus
(a) All Outputs Units that support synchronous
output refreshing read their outputs simultaneously.
(f) Set outputs
Input refreshing
Output refreshing
Summary of Contents for NX-AD series
Page 289: ......
