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5 EtherCAT Communications
GX-series EtherCAT Slave Unit User’s Manual
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 Displaying serial numbers
The serial number that is stored in non-volatile memory in the Slave Unit is given in 1018 hex-04 hex
(Serial number). Controllers that support Sysmac device functions can use serial numbers to verify
the network configuration.
To verify the configuration, set the Serial Number Check Method parameter to
Setting = Actual
device on the Edit Network Configuration Tab Page for EtherCAT on the Sysmac Studio.
A Network Configuration Verification Error will occur if verification fails for the specified method.
Reference
This helps prevent forgetting to set the parameters because a slave device that was replaced is
detected.
 Conformance to ESI specifications (ETG.2000 S (R) V1.0.1)
The ESI specifications define the contents of the EtherCAT slave information (ESI) files.
Controllers that support Sysmac device functions can use an optional function that is defined in the
ESI specifications to specify backup parameters in the Slave Units.
You can back up and restore the backup parameters that are defined in the Slave Units from the
Sysmac Studio.
 SII data checking
The SII (slave information interface) contains specific configuration information on the EtherCAT
slave that is written in non-volatile memory in the EtherCAT Slave Unit.
EtherCAT Slave Units that are Sysmac devices check the information in the SII at the Slave Units.
Precautions for Correct Use
Do not change the SII information with setting software that is produced by other companies.