Pairing Addresses In Internal Tables - Omron CJ1W-ETN21 - 04-2009 Operation Manual

IP Addresses in FINS Communications
FINS header
Internal table
Remote port
Remote FINS Remote IP
number
node number address (Example) Connection
(Example)
1 192.168.250.1 UDP 9600
192.168.250.2
2 UDP 9600
!
!
!
254 192.168.250.254 UDP 9600
Application level FINS
Transport level
UDP
Internet level IP
Physical level Ethernet
Ethernet V2
5-2-2

Pairing Addresses in Internal Tables

FINS/UDP Communications Methods
Automatic Generation
(Dynamic)
Personal computer
Local FINS node number
Local IP address
IP address
IP address
Automatic Generation
(Static)
98
FINS data
Node number
UDP port TCP port
TCP
number number
IP address
Ethernet address
IP UDP FINS header
When the Ethernet Unit is turned ON or restarted, the following values are set
for addresses in the internal table.
• Remote IP address:
• Remote UDP port number: UDP port number set for local Unit
• Connection method:
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.
Must be fixed.
Can be changed.
FINS command
FINS response
With the static method as well, the following values are set for addresses in
the internal table when the Ethernet Unit is turned ON or restarted.
Application level
Transport level
Internet level
Physical level
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.
FINS data
Local IP address network number + remote
FINS node address
FINS/UDP
Ethernet Unit
Change
registration
Automatic generation
(dynamic setting)
Internal table
Remote IP address Local IP address
Ethernet
For the remote IP address,
a response is returned to
the changed IP address.
Section 5-2
Remote node
FINS
Node number
UDP TCP
UDP port TCP port
number number
IP
IP address
Ethernet
Ethernet address
CPU Unit
Remote FINS node number
Local FINS node number