Omron NX-ECC201 User Manual

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9 Setting Up Slave Terminals
NX-series EtherCAT Coupler Unit User’s Manual (W519)
9-2 Setting Slave Terminal Parameters
9
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

Omron NX-ECC201 Specifications

General

Brand	Omron
Model	NX-ECC201
Category	Controller
Language	English