Omron Sysmac NX Series User Manual page 183

• The timing of reading input changed times, the synchronization timing, and the maximum NX bus
I/O refresh cycle are automatically calculated by the Sysmac Studio according to the input re-
fresh cycles of the NX Units on the CPU Unit when the Unit Configuration in the CPU Unit is cre-
ated and set up.
I/O refreshing synchronization
The longest AD conversion
time is within one cycle.
I/O refreshing of
the NX bus
CPU Unit
Offset between
synchronization timing
and the timing to read
inputs
This period of time is
automatically calculated
by the Sysmac Studio.
ON response time
+ Time set in the Input
Filter Setting
Trigger input to
the High-speed
Analog Input
Unit
• The High-speed Analog Input Units detect changes at the rising edge of the trigger input.
NX-series Analog I/O Units User's Manual for High-speed Analog Input Units (W592)
(b) The CPU Unit reads the input
changed time that is read by
the Unit and the input value
at this point of time at I/O
refreshing.
Synchronization timing
Input refreshing Output refreshing
T1
DC time
Input
value
Input
changed
time
Constant
Input
terminal
Input
value
Input
changed T0
time
Records T1,
which is the DC
time when the
input value
changes.
(c) Interval of I/O refreshing
Synchronization timing
Constant
T0 T1
Constant
T1
(a) The High-speed Analog Input Unit reads the input changed times.
8 Functions
is not constant
(d) Interval of synchronization
timing is constant.
Not constant
Synchronization
timing
Constant
T2
T2
(e) Constant
T2
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