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• 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.
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
(a) The High-speed Analog Input Unit reads the input changed times.
Trigger input to
the High-speed
Analog Input
Unit
T1
T2
T1
T2
T0
T1
T2
T0
(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.
(c) Interval of I/O refreshing
is not constant
(e) Constant
Constant
Constant
I/O refreshing of
the NX bus
I/O refreshing synchronization
The longest AD conversion
time is within one cycle.
Records T1,
which is the DC
time when the
input value
changes.
CPU Unit
DC time
Input
value
Input
changed
time
Input refreshing
Output refreshing
Synchronization timing
Synchronization timing
Constant
(d) Interval of synchronization
timing is constant.
Constant
Not constant
Synchronization
timing
Input
terminal
Input
value
Input
changed
time
• The High-speed Analog Input Units detect changes at the rising edge of the trigger input.
8 Functions
8 - 41
NX-series Analog I/O Units User’s Manual for High-speed Analog Input Units (W592)
8-10
T
rigger Input
8
8-10-2
Details on the Function