CV500ETN01 Omron, CV500ETN01 Datasheet - Page 125

• Manufacturer Part Number: CV500ETN01
• Description: Programmable Logic Controller
• Manufacturer: Omron

Specifications of CV500ETN01

• Peak Reflow Compatible (260 C): No
• Leaded Process Compatible: No
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

IP Addresses in FINS Communications
Prohibiting Dynamically Changing Remote IP Addresses
100
Note
With the combined method, records of FINS nodes registered to the IP
address table are not dynamically changed. For all others nodes, the data
from FINS nodes registered with a remote IP address of 0.0.0.0 can be
dynamically changed when the Unit is turned ON or restarted, according to
FINS messages received from remote nodes. This can be used effectively
when the remote node is a device such as a personal computer and IP
addresses are dynamically changed by a method such as DHCP.
Example
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.
For Ethernet Units with Unit Ver. 1.3 or later, methods used to dynamically
change remote IP addresses (automatic generation, IP address table, or com-
bined (mixed) method) can be prohibited (protected against). Use the CX-Pro-
grammer unit setting function (version 5.0 and higher) or Web function setting
window to make this setting.
When dynamically changing remote (destination) IP addresses is prohibited,
the internal table for each method is maintained in the state 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 (protect from) dynamic
changes, deselect the Change Dynamically option in the Setup Tab of the Unit
Setup.
When FINS Command is Sent
When FINS Command is Received
FINS node number
FINS node number
• FINS Node Address Not Registered to IP Address Table
Node number
not in IP
address table
Node number in
IP address table
Node number not
in IP address table
The following address is registered to the internal table.
Automatic
generation
method
Changed
• Connection method:
• Remote IP address:
• Remote UDP port number: UDP port number set for local Unit
• Connection method:
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
Local IP address network number + FINS
node address
FINS/UDP
FINS/UDP
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)