Omron SYSMAC CJ1W-EIP21, Operation Manuals

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2 Installing Ethernet Networks
2-2
CJ-series EtherNet/IP Units Operation Manual for NJ-series CPU Unit (W495)
2-1 Switch Settings on the Front Panel of
the EtherNet/IP Unit

Setting the Unit Number
The unit number is used to identify individual CPU Bus Units when more than one CPU Bus Unit is
mounted to the same Controller. Use a small screwdriver to make the setting, taking care not to
damage the rotary switch. The unit number is factory-set to 0.
Precautions for Correct Use Precautions for Correct Use
• Turn OFF the power supply before setting the unit number.
• If you set the unit number of the EtherNet/IP Unit in the Unit Configuration on the Sysmac Stu-
dio, make sure that the rotary switches are set to the same unit number. If different unit num-
bers are set in the Unit Configuration and on the rotary switches, an I/O Setting Check Error
will occur.

Setting the Node Address
The node addresses are used by the FINS communications service to identify individual EtherNet/IP
Units (nodes).
Use the node address switches to set the node address as a hexadecimal value. Do not set the
same node address as any other node on the same Ethernet network.
If the FINS communications service is not used on the Ethernet network, then it is all right for the
same node address to be set on two or more EtherNet/IP Units.
The node address must meet the following conditions.
If the conditions are not met, an error will occur (the MS indicator will flash red and the 7-segment
display will show H4 (Node Address Setting Error)) and the EtherNet/IP Unit will stop operating.
• Set the node address to between 01 and FE hex.
• Set the node address on the rotary switches and the lowest field of the IP address (i.e., the host
ID) of the EtherNet/IP Unit to the same value.
If you cannot use the same value for the node address and the lowest field of the IP address of the
EtherNet/IP Unit, you must use the IP address table method or the combined method for address
conversion. Refer to Section 5 Sysmac Studio Settings for the EtherNet/IP Unit for details.
The left switch sets the sixteens digit (most significant digit) and the right switch sets the ones digit
(least significant digit). The node address is factory-set to 01.
Precautions for Correct Use Precautions for Correct Use
Turn OFF the power supply before setting the node address.
01
23456789
ABCD
EF
UNIT
No.
Setting range:
0 to F
01
23456789
ABCD
EF
NODE
No.
×16
0
×16
1
01
23456789
ABCD
EF
Setting range:
01 to FE (1 to 254 decimal)