Omron CJ2-CPU User Manual

9 Setting Up Slave Terminals
9 - 12
NX-series EtherNet/IP Coupler Unit User’s Manual (W536)
The I/O allocation information maps the I/O data in the EtherNet/IP Coupler Unit to exchange with the
tag data link. The Slave Terminal performs tag data link exchange with the CJ EtherNet/IP Units based
on the I/O allocation information.
The EtherNet/IP 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 Slave Terminal.
Note The NX bus I/O data size is for Input 512 bytes max. and for Output 512 bytes max.
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.
9-2-3 I/O Allocation Information
Specifications for I/O Data Allocations in Slave Terminals
Item Input data Output data
Number of I/O entry mappings 255 255
EtherNet/IP maximum I/O connection size 504 bytes 504 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 (EtherNet/IP master)
Tag data link
exchange
I/O allocation information
Network
Symbols

Omron CJ2-CPU Specifications

General

Brand	Omron
Model	CJ2-CPU
Category	Controller
Language	English