Omron NX-ECC201 User Manual page 233

 Verifying the EtherCAT Network Configuration Using Serial Numbers
Controllers that support Sysmac devices can verify the EtherCAT network configuration based on
the serial numbers.
To enable verification, set the Serial Number Check Method to Setting = Actual device in the Edit
EtherCAT Configuration Edit Tab Page on the Sysmac Studio.
A Network Configuration Verification Error occurs if the specified standard is not met.
This function detects when the EtherCAT Coupler Unit was replaced so that you can remember to
set the parameters for the EtherCAT Coupler Unit.
 SII Data Checking
The EtherCAT Coupler Unit checks the information in the SII (slave information interface).
The SII contains setting information that is unique to each EtherCAT slave. It is written to the
non-volatile memory in the EtherCAT slave (in the EtherCAT Coupler Unit for an EtherCAT Slave
Terminal).
Because the EtherCAT Slave Terminal is a Sysmac device, it checks the SII information at the slave.
If the slave contains SII information that prevents it from operating, a Slave Unit Verification Error
occurs to inform you that there is an error in the SII data.
Precautions for Correct Use
Do not change the SII information with setting software from other manufacturers.
NX-series EtherCAT Coupler Unit User's Manual (W519)
11 EtherCAT Coupler Unit Functions
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