Emerson Rosemount 2460 System Hub - Recommendations for Modbus TCP IP Addressing

128
Reference Manual
00809-0100-2460, Rev DE
Service and Troubleshooting
October 2018
Service and Troubleshooting
6.14.1 Recommendations for Modbus TCP IP addressing
Network mode “Static” is the recommended selection for Eth1. There is neither a default IP address nor a
default Netmask since they depend on the local network environment and the IP settings of the host PC.
The recommendation is however to use IP addresses in the so-called private address range according to
Tab le 6 -5 below:
Table 6-5. Recommended IP address ranges
IP addressing for the ETH1 port must not interfere with the settings of ETH2 and ETH3.
It is not recommended to use the private address 192.168.X.Y with a netmask of 255.255.0.0 since the
ETH3 IP address 192.168.3.10 is located within this Netmask range. Using a tighter Netmask, e.g.
“255.255.255.0”, will enable the use of IP address starting with “192.168.X” where X can be any number
other than 3.
IP address starting with 9 is not allowed since this IP range is reserved for Eth2 and the redundancy
connection.
Always avoid using the network and broadcast address on an interface. (0 and 255 for a default Class C
network.)
IP Address range Netmask Comment
10.0.0.1- 10.255.255.254 255.0.0.0 Use tighter Netmask if possible, e.g. 255.255.255.0.
172.16.0.1- 172.31.255.254 255.240.0.0 Use tighter Netmask if possible, e.g. 255.255.255.0.
192.168.0.1–192.168.255.254 255.255.0.0
Be aware of the Eth3 static IP Address of 192.168.3.10,
i.e. it is recommended to not enable this full range! See
further below.