Download SYSMAC CS and CJ Series CS1W-EIP21 (100Base-TX

Section 5-2
IP Addresses in FINS Communications
FINS data
FINS header
Internal table
Remote FINS
node number
1
2
!
!
!
254
Remote IP
address (Example) Connection
192.168.250.1
192.168.250.2
UDP
UDP
9600
9600
192.168.250.254
UDP
9600
Application level
Transport level
Remote node
Remote port
number
(Example)
Application level FINS
FINS
UDP
Internet level
IP
Physical level
Ethernet
Node number
UDP port
number
TCP
TCP port
number
Ethernet address
5-2-2
IP
UDP
UDP
Internet level
IP
Physical level
Ethernet
TCP
UDP port
number
TCP port
number
IP address
Ethernet address
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.
IP address
Ethernet V2
Node number
Transport level
FINS header
FINS data
Pairing Addresses in Internal Tables
FINS/UDP Communications Methods
Automatic Generation
(Dynamic)
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.
• Remote IP address:
Local IP address network number + remote
FINS node address
• Remote UDP port number: UDP port number set for local Unit
• Connection method:
FINS/UDP
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.
EtherNet/IP Unit
CPU Unit
Remote FINS node number
Personal computer
Must be fixed.
Local FINS node number
Can be changed.
Local IP address
Automatic generation
(dynamic setting)
Internal table
Remote IP address
IP address
FINS command
IP address
FINS response
Local FINS node number
Change
registration
Local IP address
Ethernet (EtherNet/IP)
For the remote IP address,
a response is returned to
the changed IP address.
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