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5 I/O Refreshing
5 - 20
NX-series Digital I/O Unit User’s Manual (W521)
Sync0
Sync0
Sync0
T1
T2
T1
T2
T0
DC time
Input value
T1
T2
T0
Input
terminals
Input
value
I/O refreshing synchronization
The longest AD conversion time
is within one cycle.
AD conversion
time for all Units.
(d) Constant
(b) The Communications Coupler Unit
reads the latched data at I/O refreshing.
(c) Interval of I/O refreshing
is not constant.
Digital Input
Unit
Analog Input
Unit
Not constant.
Input 1
I/O refreshing
of the NX bus
(d) Interval of Sync0 is constant.
Input filter time
Offset between
Sync0 and timing to
read inputs
This time is automatically
calculated by the Sysmac
Studio.
Constant
Constant
Communications
Coupler Unit
Constant
Input 2
Input 1
Input 2
Input 1
Input 2
Digital Input Unit
that supports input
refreshing with input
changed time
Records T1, which is
the DC time at the
point when the input
value changed.
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.
Input
changed
time
Input
changed
time
ON/OFF response
time
ON/OFF response
time
Constant
Output refreshing
Input refreshing
Summary of Contents for NX-IA3117
Page 34: ...Sections in this Manual 32 NX series Digital I O Unit User s Manual W521...
Page 52: ...1 Features and System Configuration 1 18 NX series Digital I O Unit User s Manual W521...
Page 56: ...2 Specifications 2 4 NX series Digital I O Unit User s Manual W521...
Page 152: ...5 I O Refreshing 5 36 NX series Digital I O Unit User s Manual W521...
Page 204: ...8 Digital Mixed I O Units 8 8 NX series Digital I O Unit User s Manual W521...
Page 224: ...9 Troubleshooting 9 20 NX series Digital I O Unit User s Manual W521...
Page 230: ...10 Inspection and Maintenance 10 6 NX series Digital I O Unit User s Manual W521...
Page 337: ...I 1 I NX series Digital I O Unit User s Manual W521 Index...
Page 340: ...I 4 NX series Digital I O Unit User s Manual W521 Index...