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9 Setting Up Slave Terminals
NX-series EtherCAT Coupler Unit User’s Manual (W519)
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9-2-4 I/O Allocation
Information
The I/O allocation information tells what I/O data in the EtherCAT Coupler Unit and the NX Units to
exchange with process data communications.
The EtherCAT Slave Terminal performs process data communications with the EtherCAT master based
on the I/O allocation information.
The EtherCAT Coupler Unit and the NX Units contain default values for the I/O allocation information.
These default values are sufficient for a standard exchange of I/O data. Change the settings as neces-
sary.
The following limitations apply to I/O data allocations for the entire EtherCAT Slave Terminal.
To allocate I/O, select an I/O entry mapping and register an I/O entry to the I/O entry mapping.
Selecting I/O Entry Mappings
An I/O entry mapping defines a set of I/O data. Each Unit has its own I/O entry mapping.
The data for each I/O entry included in the selected I/O entry mappings are exchanged using pro-
cess data communications. Default values are assigned to the I/O entry mapping selections.
Change the I/O entry mapping selections as necessary. If an I/O entry mapping must be selected,
the option to deselect it will not be available.
9-2-4
I/O Allocation Information
Specifications for I/O Data Allocations in EtherCAT Slave Terminals
Item
Input data
Output data
Number of I/O entry mappings
255
255
I/O data size
1,024 bytes
1,024 bytes
Allocatable I/O data points
Maximum of 4,000 points total for both inputs and outputs
I/O Allocation Settings
NX Units
CPU Unit (EtherCAT master)
Variables
Process data
communications
I/O allocation information
Summary of Contents for NX-ECC201
Page 38: ...Sections in this Manual 36 NX series EtherCAT Coupler Unit User s Manual W519...
Page 46: ...1 EtherCAT Networks 1 8 NX series EtherCAT Coupler Unit User s Manual W519...
Page 56: ...2 Features and System Configuration 2 10 NX series EtherCAT Coupler Unit User s Manual W519...
Page 82: ...4 Part Names and Functions 4 14 NX series EtherCAT Coupler Unit User s Manual W519...
Page 100: ...5 Designing the Power Supply System 5 18 NX series EtherCAT Coupler Unit User s Manual W519...
Page 214: ...9 Setting Up Slave Terminals 9 44 NX series EtherCAT Coupler Unit User s Manual W519...
Page 254: ...11 EtherCAT Coupler Unit Functions 11 30 NX series EtherCAT Coupler Unit User s Manual W519...
Page 278: ...12 Communications Performance 12 24 NX series EtherCAT Coupler Unit User s Manual W519...
Page 340: ...14 Maintenance and Inspection 14 8 NX series EtherCAT Coupler Unit User s Manual W519...
Page 400: ...Appendices A 60 NX series EtherCAT Coupler Unit User s Manual W519...
Page 401: ...Index 1 NX series EtherCAT Coupler Unit User s Manual W519 I Index...
Page 405: ......