Omron CJ1W-ECT21 Operation Manual page 54

2 Nomenclature and Installation
Node Address Switches
The node address switches set the node address of the EtherCAT Slave Unit to enable the EtherCAT
master to recognize the EtherCAT Slave Unit.
The value of node address is loaded to register 0012h of the EtherCAT slave controller when the power
supply to the CJ1W-ECT21 is turned ON.
The upper switch sets the sixteens digit (most significant digit) and the lower switch sets the ones digit
(least significant digit).
There are two methods to set the node address: hardware switches and software switches.
The switch settings are used to select the method to use.
 Set the Node Address with Hardware Switches
Use the switch settings to set the node address from 1 to 255. If these switches are not set to 00, the
node address that is set on the switches will be used.
Setting method: Two-digit hexadecimal
Setting range: 01 to FF hex
The node address is set to 00 at the factory.
 Setting the Node Address with Software Switches
To set the node address with software switches, set the node address switches to 00. When the
switches are set to 00, use the EtherCAT master Configuration Software to set a range from 1 to
65535 for the node address.
Precautions for Correct Use
• The node address that is set with hardware or software switches is read only when the Unit
initializes (upon power-up or restart). Changing the node address while the Unit is opera-
tional will not effect the EtherCAT Slave Unit unless a restart or power-up is applied.
• An error may occur on the EtherCAT master if the same node address is set for more than
one slave present on the EtherCAT network.
• An error may occur on the EtherCAT master if the node address is not within the setting
range specified for the EtherCAT master.
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CJ-series EtherCAT Slave Units Operation Manual for NJ-series CPU Unit (W542)