Omron NX-ID3343 User Manual page 136

5 I/O Refreshing
Offset between
Sync0 and timing to
read inputs
This time is automatically
calculated by the Sysmac
Studio.
I/O refreshing
of the NX bus
DC time
Communications
Input value
Coupler Unit
Input
changed
time
Digital Input
Unit
Analog Input
Input 1 Input 2
Unit
Input
terminals
Digital Input Unit
Input
that supports input
value
refreshing with input
changed time
Input
changed
time
5 - 20
I/O refreshing synchronization
The longest AD conversion time
is within one cycle.
(b) The Communications Coupler Unit
reads the latched data at I/O refreshing.
Sync0
Output refreshing
Input refreshing
T1
Constant
ON/OFF response
time
Input filter time
Input 1
AD conversion
time for all Units.
ON/OFF response
time
T0 T1
Records T1, which is
the DC time at the
point when the input
value changed.
(c) Interval of I/O refreshing
is not constant.
Sync0
Constant
T0 T1
Constant
Input 2 Input 1
Latches the
input value
and input
changed time
at the timing
to read inputs.
(a) All Input Units that operate with synchronous
input refreshing and input refreshing with input
changed times read their inputs at the same time.
NX-series Digital I/O Unit User's Manual (W521)
(d) Interval of Sync0 is constant.
Not constant.
Sync0
Constant
T2
T2
(d) Constant
Input 2
T2