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6 Digital Input Units
NX-series Digital I/O Unit User’s Manual (W521)
6-
4 Fu
nct
ion
6
6-
4-1 List of Digit
a
l Inpu
t Unit Functions
6-4
Function
This section describes the Digital Input Unit functions.
Refer to the specifications of each model in
on page A-2 for details on the functions.
6-4-1
List of Digital Input Unit Functions
Function name
Description
Reference
Free-Run Refreshing
With this I/O refreshing method, the refresh cycle of the NX
bus and the I/O refresh cycles of the NX Units are asynchro-
nous.
Synchronous I/O Refresh-
ing
With this I/O refreshing method, the timing to read inputs or to
refresh outputs is synchronous on a fixed interval between
more than one NX Unit on more than one Slave Terminal.
5-2-5 Synchro-
nous Input
Refreshing
Time Stamp Refreshing
With this I/O refreshing method, the NX Units record the DC
times when inputs change or perform outputs at specified DC
times. These times are asynchronous to the NX bus refresh
cycles.
Data exchange between the NX Units and EtherCAT Coupler
Unit are performed cyclically on the NX bus refresh cycles.
Input refreshing
with input changed
time
With this I/O refreshing method, the Input Units record the DC
times when inputs changed.
5-2-8 Input
Refreshing with
Input Changed
Time
Input Filter
This function eliminates the chattering or the noises from input
signals. It is used to prevent the error reading due to the
noises. You can set the filter time constant.
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...