Publication 1734-UM014A-EN-P - November 2010
26 Configure the Adapter for Your EtherNet/IP Network
Use DHCP Software to
Configure Your Adapter
DHCP (Dynamic Host Configuration Protocol) software automatically assigns
IP addresses to client stations logging onto a TCP/IP network.
DHCP is based on BootP and maintains some backward compatibility. The
main difference is that BootP was designed for manual configuration, while
DHCP allows for dynamic allocation of network addresses and configurations
to newly attached devices.
Be cautious about using DHCP software to configure your adapter. A DHCP
server typically assigns a finite lease time to the offered IP address.
When 50% of the leased time has expired, the adapter attempts to renew its IP
address with the DHCP server.
The possibility exists that the adapter will be assigned a different IP address,
which would cause the adapter to cease communicating with the ControlLogix
controller.
See Configure the Adapter with Fixed IP Address on page 45 to configure the
adapter with a fixed IP address.
To avoid unintended control or loss of control, the I/O adapter must
be assigned a fixed IP address. A dynamically provided IP address
should be used only at initial configuration. If a DHCP server is used,
it must be configured to assign the same IP address to your adapter.
Failure to observe this precaution may result in unintended machine
motion or loss of process control.
To Next Page
Loading...
Need help?
General
