I/O Allocation Information - Omron NX-ECC201 User Manual

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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.
CPU Unit (EtherCAT master)
Variables
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.
Specifications for I/O Data Allocations in EtherCAT Slave Terminals
The following limitations apply to I/O data allocations for the entire EtherCAT Slave Terminal.
Number of I/O entry mappings
I/O data size
Allocatable I/O data points
I/O Allocation Settings
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.
NX-series EtherCAT Coupler Unit User's Manual (W519)
Process data
communications
I/O allocation information
Item
255
1,024 bytes
Maximum of 4,000 points total for both inputs and outputs
9 Setting Up Slave Terminals
NX Units
Input data
255
1,024 bytes
Output data
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