Omron NX-ID User Manual page 154

5 I/O Refreshing
I/O refreshing synchronization
The longest AD conversion time
is within one cycle.
I/O refreshing
of the NX bus
Input refreshing
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
that supports input Input
value
refreshing with input
changed time
Input
changed
time
5 - 24
(b) The Communications Coupler Unit
reads the input changed times that are
read by the Unit and the input values at
this point at I/O refreshing.
Sync0
Constant
Output refreshing
T1
T0
Constant
Offset between
Sync0 and
timing to read
inputs
This time is
ON/OFF response
automatically
time
Input filter time
calculated by
the Sysmac
Studio.
Input 1 Input 2
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.
(a) All Units that support input refreshing with input
changed time read their input changed times
simultaneously.
All Input Units that support synchronous input
refreshing read their inputs simultaneously.
(c) Interval of I/O refreshing (d) Interval of Sync0
is constant.
is not constant.
Sync0
Constant
T2
T1
Constant
Input 1 Input 2
T2
NX-series Digital I/O Unit User's Manual (W521)
Not constant.
Sync0
T2
(e) Constant