CJ1W-EIP21 Omron, CJ1W-EIP21 Datasheet - Page 127

• 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

IP Addresses in FINS Communications
Prohibiting Dynamically
Changing Remote IP
Addresses
Using the ETN11-
compatible Mode
Note When an internal table IP address has been changed with the reception of a
Example
FINS command, this is sent to the IP address in the internal table.
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.
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.
When FINS Command is Sent
When FINS Command is Received
FINS node number
FINS node number
• If the command data is addressed to an Ethernet Unit, a FINS response
• If the command data is for any other Unit, such as the CPU Unit, a FINS
Node number
not in IP
address table
Node number in
IP address table
Node number not
in IP address table
will be sent to the source UDP port number.
response will be sent to the UDP port number set as the FINS/UDP port
number.
Automatic
generation
method
Changed
FINS node
number
Network number: xx.xx.00.00
FINS node number: xx
18
20
23
25
IP address table
Internal table
153.214.0.129
153.214.0.62
153.218.51.10
153.218.51.8
+
IP address
IP address
FINS command
sent
IP address
(See note.)
FINS command
sent
IP address
153.218.51.10
FINS response
returned
Section 5-2
IP address
method
Automatic
generation
method
(dynamic)
99