User's Manual

Elpro Technologies 450U-E Wireless Ethernet Modem & Device Server User Manual
44 www.cooperbussmann.com/wirelessresources Rev Version 1.4.0
has a reduced throughput compared with other Ethernet modems it is very important that any unnecessary traffic is not
broadcast over the radio, therefore it is highly recommended that the ARP filters are enabled and configured.
what is required is to add the IP address for all remote
modems and any device that is connected to these remote radios in the ARP filter table.
modem has rebooted it will only pass ARP traffic for the IP addresses configured.
Modbus TCP 3.12
The 450U-E also has an on-board Modbus TCP Server and Modbus TCP Client that provide connectivity for a range of
Modbus applications. The Modbus TCP Client and the Modbus TCP Server can be enabled simultaneously, and when
combined with the built in Modbus TCP/RTU Converter (enabled on the Serial page) the 450U-E can transfer I/O to/from
almost any combination of Modbus TCP or RTU devices.
Modbus TCP Server
Modbus TCP Server enables the 450U-E to accept connections from
Modbus TCP Clients.
All Modbus transactions routed to the onboard Modbus TCP Server are
directed to/from the onboard general purpose I/O registers. The Modbus
TCP Server can also be shared with the Modbus TCP/RTU Converter (if
enabled) must be a unique address which is why the
default is set to 255. Care should be taken to ensure any serially
connected Modbus devices use a different Modbus Device ID (i.e. Modbus
Slave Address) to that of the onboard Modbus TCP Server. Up to 32
separate connections to the Modbus TCP Server are supported.
Modbus TCP Client
The Modbus TCP Client enables the 450U-E to connect to one or more Modbus TCP Servers.
All Modbus Mappings are directed to/from the onboard I/O registers depending on configuration which is described
below.
Communications with the Remote TCP Servers is achieved with the use of Mappings. All Mappings are directed to/from
the onboard I/O registers and are setup
button and a new default mapping will be added to the table. You will then need to edit this entry and configure the
parameters to match the application. Each column is described in the table below.
Se
A Blacklist will block ARP requests that match the entry.
A Whitelist will allow only ARP Requests that match the entry. All other devices are
blocked.
Add Entry
Add a row to the table of ARP Address filter rules
Delete Entry
Delete the currently selected ARP address filter rule.
Enable
Check this box to enable the rule
IP Address
This sets the IP address that you wish to filter.
IP Netmask
Sets the IP Netmask
Save Changes
Save changes to non-volatile memory (Reset is required to activate)
Save Changes and
Reset
Save to non-volatile memory and restart to activate changes
Figure 49 -Modbus TCP Server