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IP Addresses in FINS Communications Section 5-2
Example
Note When an internal table IP address has been changed with the reception of a
FINS command, this is sent to the IP address in the internal table.
Prohibiting Dynamically
Changing Remote IP
Addresses
With EtherNet/IP Units and built-in EtherNet/IP ports, it is possible to prohibit
(protect against) dynamic changes to remote IP addresses by each method
(automatic generation, IP address table, or combined method). Use the CX-
Programmer to make this setting.
When dynamically changing remote (destination) IP addresses is prohibited,
the internal table for each method is maintained in the same state it had when
the power was turned ON or restarted. Therefore, protection can be provided
against access using FINS/UDP from personal computers or other devices
that have dynamically changing IP addresses. To prohibit dynamic changes,
clear the selection of the Dynamic change the target IP addresses Option on
the FINS/UDP Tab Page in the Edit Parameters Dialog Box of the CX-Pro-
grammer.
Using the ETN11-
compatible Mode
With EtherNet/IP Units and built-in EtherNet/IP ports, operating specifications
can be made compatible with the CS1W-ETN11/CJ1W-ETN11 for all methods
(automatic generation (dynamic), I/O address table, or combined). (Dynamic
changes, however, are prohibited for the destination IP address in ETN11-
compatible mode.) While in ETN11-compatible mode, the following operations
will be performed the same as they are for the CS1W-ETN11/CJ1W-ETN11
for FINS/UDP command data sent from a UDP port number other than the
local FINS/UDP port number (default: 9600) set ion the FINS/UDP Tab Page.
• If the command data is addressed to an Ethernet Unit, a FINS response
will be sent to the source UDP port number.
• If the command data is for any other Unit, such as the CPU Unit, a FINS
response will be sent to the UDP port number set as the FINS/UDP port
number.
When FINS Command is Sent
FINS node number
FINS node number
Node number in
IP address table
18
20
23
153.214.0.62
153.214.0.129
153.218.51.8
25 153.218.51.10
Node number not
in IP address table
Automatic
generation
method
IP address table
FINS node
number
Network number: xx.xx.00.00
IP address
FINS node number: xx
+
IP address
FINS command
sent
IP address
(See note.)
FINS command
sent
When FINS Command is Received
Node number
not in IP
address table
Changed
Internal table
IP address
153.218.51.10
FINS response
returned
Automatic
generation
method
(dynamic)
IP address
method