User manual
54 Publication ENET-UM001I-EN-P - January 2010
Chapter 4 Configure an EtherNet/IP Module to Operate on the Network
DNS Addressing
To further qualify a module’s address, use DNS addressing to specify a host
name for a module, which also includes specifying a domain name and DNS
servers. DNS addressing makes it possible to set up similar network structures
and IP address sequences under different domains.
DNS addressing is only necessary if you refer to the module by
host name,
such as in path descriptions in MSG instructions.
To use DNS addressing, perform this procedure.
1. Assign a host name to the module.
A
network administrator should be able
to assign a host name. Valid
host names should be IEC-1131-3 compliant.
2. Configure the module's parameters.
3. In addition to the IP address, subnet mask, and gateway address,
con
figure a host name for the module, domain name, and
primary/secondary DNS server addresses.
In the DNS server, the host name must matc
h the IP address of the
module.
IMPORTANT
Make sure the DNS enable bit is set.
If you configure your module using RSLinx software,
version 2.41, the enable bit is cleared and DNS
addressing will not work. If you configure your module
using the Port Configuration tab in RSLogix 5000
programming software, the enable bit is set, so DNS
addressing should work.