Rockwell Automation Publication 2080-UM002N-EN-E - November 2022 67
Chapter 5 Communication Connections
3. Click the checkbox Detect duplicate IP address to enable detection of duplicate
address.
4. Under Ethernet, click Port Settings.
5. Set Port State as Enabled or Disabled.
6. To manually set connection speed and duplexity, uncheck the option box Auto-
Negotiate speed and duplexity. Then, set Speed (10 Mbps or 100 Mbps) and Duplexity
(Half or Full) values.
7. Click Save Settings to Controller if you would like to save the settings to your controller.
8. On the device configuration tree, under Ethernet, click Port Diagnostics to monitor
Interface and Media counters. The counters are available and updated when the
controller is in Debug mode.
Validate IP Address
Modules must validate the incoming IP address configuration, whether it is obtained through
explicit configuration or through DHCP.
The following rules must be obeyed when configuring the IP address:
• The IP address for the module cannot be set to zero, a multicast address, a broadcast
address, or an address on the Class A loopback network (127.x.x.x).
• The IP address should not start with zero, and the IP address network ID should be not
zero.
• The Network mask cannot be set to 255.255.255.255.
• The Gateway address must be on the same subnet as the IP address that is being
configured.
• The Name Server address cannot be set to zero, a multicast address, a broadcast
address, or an address on the Class A loopback network (127.x.x.x).
The valid range of static IPv4 IP address exclude:
• Broadcast or zero IP (255.255.255.255 or 0.0.0.0)
• IP address starting with 0 or 127 (0.xxx.xxx.xxx or 127.xxx.xxx.xxx)
• IP address ending with 0 or 255 (xxx.xxx.xxx.0 or xxx.xxx.xxx.255)
• IP addresses in range 169.254.xxx.xxx (169.254.0.0 to 169.254.255.255)
• IP addresses in range 224.0.0.0 to 255.255.255.255
IMPORTANT When a DHCP server fails, the Micro800 controller allocates IP
addresses in the private range 169.254.0.1 to 169.254.255.254. The
Micro800 controller verifies its address is unique on the network
using ARP. When the DHCP server is again able to service
requests, the Micro800 controller updates its address
automatically.
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