Synchronization timing Synchronization timing
Synchronization
timing
T1 T2
T1 T2T0
T1 T2T0
Digital Input
Unit
Analog Input
Unit
I/O refreshing
of the NX bus
CPU Unit
Offset between
synchronization
timing and
timing to read
inputs
This time is
automatically
calculated by
the Sysmac
Studio.
I/O refreshing synchronization
The longest AD conversion time
is within one cycle.
Output refreshingInput refreshing
Constant Constant
(b) The CPU Unit reads the input changed
times that are read by the Unit and the
input values at this point at I/O
refreshing.
(c) Interval of I/O refreshing
is not constant.
Not constant.
DC time
Input value
Input
changed
time
Digital Input Unit
that supports input
refreshing with input
changed time
Input
terminals
Input
value
Input
changed
time
Input 1 Input 2 Input 1 Input 2 Input 1 Input 2
Constant Constant
(e) Constant
Input filter time
ON/OFF response
time
AD conversion
time for all Units.
ON/OFF response
time
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.
(d) Interval of
synchronization
timing is constant.
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