CJ1W-EIP21 Omron, CJ1W-EIP21 Datasheet - Page 124

• Manufacturer Part Number: CJ1W-EIP21
• Description: Ethernet I/P Module
• Manufacturer: Omron

Specifications of CJ1W-EIP21

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

5-2-2
FINS/UDP Communications Methods
Automatic Generation
(Dynamic)
96
IP Addresses in FINS Communications
Application level
Transport level
Internet level
Physical level
Personal computer
Local FINS node number
Local IP address
Internal table
Remote FINS
node number
Pairing Addresses in Internal Tables
254
1
2
!
!
!
Ethernet V2
Remote IP
address (Example) Connection
192.168.250.1
192.168.250.2
192.168.250.254
FINS
UDP
IP
Ethernet
UDP
UDP
UDP
Remote port
number
(Example)
IP address
IP address
9600
9600
9600
FINS header
Must be fixed.
Can be changed.
UDP port
number
Ethernet address
IP
Node number
When the EtherNet/IP Unit or built-in EtherNet/IP port is turned ON or
restarted, the following values are set for addresses in the internal table.
With the dynamic method, data in an internal table that has been generated
can be dynamically converted according to FINS messages received from
remote nodes. This is enabled when the remote node is a device such as a
personal computer and IP addresses are dynamically changed by a method
such as DHCP.
FINS command
FINS response
IP address
• Remote IP address:
• Remote UDP port number: UDP port number set for local Unit
• Connection method:
TCP
UDP
FINS data
TCP port
number
FINS header
EtherNet/IP Unit
Change
registration
Remote IP address
For the remote IP address,
a response is returned to
the changed IP address.
Automatic generation
(dynamic setting)
The remote node's IP address, UDP/TCP
method, UDP port number, and TCP port
number are calculated from the node
number in the FINS message, and an
Ethernet frame is generated.
Internal table
Local IP address network number + remote
FINS node address
FINS/UDP
FINS data
Local IP address
Application level
Transport level
Internet level
Physical level
Ethernet (EtherNet/IP)
FINS
UDP
IP
Ethernet
CPU Unit
Local FINS node number
Remote FINS node number
UDP port
number
Ethernet address
Node number
IP address
Section 5-2
Remote node
TCP
TCP port
number