DHCP
DHCP servers are a part of numerous LAN management systems. The DHCP field has two
selections, “Enable” or “Disable”. Arrow to the desired selection and select enter.
When enabled, TRP-C31M will send a DHCP request to the DHCP server, which will assign a
dynamic IP address, Netmask, and gateway to the TRP-C31M. If a DHCP server is not available on
the network the TRP-C31M will time out after 10 seconds and the default values will remain. When
DHCP is enabled, the IP address, Netmask and Gateway fields become inaccessible and cannot
be changed by the user.
IP Address
A static IP address can also be assigned in this section of the menu. A dynamic address assigned
by the DHCP server may change if the TRP-C31M looses the Ethernet connection or power is
removed. The host (client) communication software requests a connection to the specific IP
address of the MODBUS gateway. If the DHCP reassigns a different IP address the software will
not be able to communicate with the hardware. It is recommended to use a static IP address.
A static IP address is permanent and will not change unless changed in the menu. In most cases
the network administrator establishes the static address to be used.
Netmask
The default LAN Netmask is configured for a Class C address. This maybe reconfigured by the
user.
Gateway
The gateway IP address allows users to access the MODBUS gateway from outside of the LAN.
MAC Address
The MAC address is not adjustable. This is assigned in the factory. Every Ethernet device
manufactured has it own unique MAC address.
Link Status
Link status automatically displays the type of Ethernet connection. It will either display 10 Base-T or
100Base-TX in full duplex or half duplex. This will depend on the LAN, switches, hubs used in the
LAN topology.