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6.2.3 USB host interface connection (optional)
If the viasis 3003 is delivered with USB interfaces the USB sockets USB-A (for memory
sticks) and USB-B (PC connection) are placed on the control panel, located in the battery box,
see also illustration 14.
Before you can establish a USB
data connection with your com-
puter you need to install an
USB device driver, see chapters
6.2.3.1, 6.2.3.2 and 6.2.3.3.
The used driver is a Windows
standard interface driver
“usbser.sys” for a so called CDC
(Communication Device Class)
device, which also sets up a virtual COM port (a virtual serial interface), which can be used by
terminal programs.
The USB driver installation should preferably done with administrator user rights.
The
USB-Link
LED is lit continuously as soon you plugged the cable in the viasis USB-B
socket and a USB-A socket of your computer.
For a proper operation be aware of:
-
The viasis cannot be supplied by the USB interface, therefore the viasis
must by powered e. g. by a charged 12Volt battery for establishing a
data connection.
-
The internal viasis microcontroller has physically only one USB
host/client interface, which can be configured either as a host or client
USB interface, so either a PC connection can be made or else a USB
memory stick shall be plugged in, but both will not work the same
time.
-
During power on initialization (
USB-Link
LED lit) no USB connec-
tion shall exist or shall be established. As soon the viasis completed
initialization and the LED begins to flash shortly make a USB connec-
tion.
-
In case the USB connection to your computer is made by means of a
USB hub, the data transmission speed can be reduced remarkably.
-
Always close the data connection before you unplug the cable. In
viagraph this is done by closing the main window, e. g. in the terminal
program HyperTerminal exists a
connect/disconnect
button to sepa-
rate and close the connection. Otherwise the programs may hang up or
do not recognize a reconnected viasis.
Illustration 14: Control panel with USB sockets
