SETUP
Page 72
DOC_DEV_Router setup guide_A
19.8
USB gateway
19.8.1
Overview
The USB to IP gateway is able to forward IP traffic from devices connected to the Ethernet network to a USB
device.
On the USB interface, the Router behaves like a USB host and a PPP client.
The USB device connected to the Router USB interface must behave like a PPP server.
Destination IP address; main case
When a device, connected to the Ethernet network, needs to transmit data to the USB device, the destination
address of the IP frames which need to be transmitted to the USB device must be a specific IP address
assigned to the USB gateway of the Router (see the configuration below).
Destination IP address; Modbus case
If no
specific
IP address is assigned to the USB gateway (see below), the
Router
forwards only modbus TCP traffic to
the USB interface.
The destination IP address of the IP frames must be the LAN IP address of the
Router
.
19.8.2
Set-up
Select the “Setup” menu and then the “USB” menu.
“Activate” checkbox
:
Select th
e “Activate” checkbox.
“Use a specific IP address” checkbox
:
If modbus TCP traffic only has to be forwarded to the USB device, that checkbox must not be selected.
If other kinds of traffic have to be forwarded, that checkbox has to be selected.
“Specific IP address” parameter
:
If modbus TCP traffic only has to be forwarded to the USB interface, no IP address has to be entered.
If other kinds of traffic have to be forwarded to the USB device, an additional IP address must be assigned to the Router.
That address belongs to the network connected to the LAN interface of the Router. It is the IP address of the USB
gateway.
It will be used as the destination IP address of the IP frames which must be forwarded to the USB device.
“Accept WAN traffic” checkbox:
It is necessary to select that checkbox it the PC is connected to the network through the Router the WAN interface.
It is not necessary to select that checkbox if the remote PC is connected to the Router through a VPN or through the LAN
interface.
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