Omron NJ501-1300 - Page 180

8 Message Communications
8-8
NJ-series CPU Unit Built-in EtherNet/IP Port User’s Manual (W506)
z Accessing via a Relay Node
Example: Communicating from CPU Unit 1 to CPU Unit 3 via CPU Unit 2
(1) CPU Unit 1 to CPU Unit 2
• Network type number: “#02” (Output the command via EtherNet/IP port.)
• Remote address: Specify the remote IP address.
(2) CPU Unit 2 to EtherNet/IP Unit 2
• Network type number: “#01” (Output the command via internal backplane port.)
• Remote address: “#12” (Unit address of EtherNet/IP Unit (Unit number: 2+10 hex =
12 hex))
(3) EtherNet/IP Unit 2 to EtherNet/IP Unit 3
• Network type number: “#02” (Output the command via EtherNet/IP port.)
• Remote address: Specify the remote IP address.
(4) EtherNet/IP Unit 3 to CPU Unit 3
• Network type number: “#01” (Output the command via internal backplane port.)
• Remote address: “#00” (unit address of CPU Unit)
In the CIP world, each device is modeled as a collection of objects. An Object abstractly represents the
specific configuration elements of a device.
Request Path (IOI)
CPU Unit 1
EtherNet/IP port
IP address:
192.168.250.2
Backplane
port #01
Unit address
00 hex
Communications
port (#02)
EtherNet/IP
port
Unit address
12 hex
Backplane
port #01
Built-in
EtherNet/IP port
IP address:
192.168.250.2
EtherNet/IP Unit 3
CPU Unit 3
EtherNet/IP Unit 2
CPU Unit 2
Built-in
EtherNet/IP
port
Communica-
tions port
(#02)
(3) Unit address of remote CPU Unit
\02\192.168.250.2\01\#12\02\192.168.250.3\01\#00
(2) IP address of remote EtherNet/IP Unit
(1) Unit address of Local EtherNet/IP Unit (Unit number: 1+10 hex)
Route path
(1)
(2)
:
(3) (4)
Object Instance
Data
Data
Data
Data
Processing
Attributes
Service
External request
(example: read)
Device
Object
Object
Object