Ip Addresses In Fins Communications; Specifying Nodes In Fins Communications Services - Omron CS Series Operation Manual

IP Addresses in FINS Communications

5-2

IP Addresses in FINS Communications

5-2-1

Specifying Nodes in FINS Communications Services

Note
Allocating Addresses to Ethernet Units
Ethernet Unit FINS
Message Reception
96
component and host ID component. Because CIDR does not use a class, it is
possible to divide the IP address space as desired, which enables efficient
use of IP address space (i.e., number of hosts). For example, it is possible to
build a horizontally distributed network exceeding 254 nodes by setting a net-
work mask using CIDR even if class C (192.168, . . .) is used.
Subnet mask range
192.0.0.0 to 255.255.255.252
With FINS communications services on an Ethernet network, IP addresses,
UDP port numbers, and TCP port numbers are paired with FINS node
addresses to specify nodes on the network.
Application level FINS
Transport level UDP
UDP port
number
Internet level IP
Physical level Ethernet
Use the "Node No." rotary switch on the front of the Ethernet Unit to set the
FINS node address.
The IP address, FINS/UDP port number, and FINS/TCP port number set for
the Ethernet Unit are mainly used when receiving FINS communications mes-
sages.
Application level FINS
Transport level UDP
UDP port
number
Internet level IP
Physical level Ethernet
Ethernet V2
• Ethernet address:
• IP address:
Node number
TCP
TCP port
number
IP address
Ethernet address
Node number
TCP
TCP port
number
IP address
Ethernet address
IP UDP
FINS header
A fixed number is assigned to each Ethernet Unit
and it cannot be changed.
Either use the default IP address
(192.168.250.FINS_node number), or set the
address in the word allocated in the DM Area or
in the Unit Setup from the CX-Programmer.
Section 5-2
Must be allocated.
Automatically allocated
Receives communications data
conforming to Ethernet address,
IP address, UDP port number,
and FINS node number.
FINS data