SERIAL COMMUNICATION AND COMPUTER/PRINTER SETUP CONTINUED
CONNECTING TO A SERIAL PRINTER
Connect the cable supplied with the printer to the
scale's RS-232 port. Make sure that the balance and
printer communication settings match.
Test communication with the printer by pressing the Print
button. If the balance and printer are set up properly,
the value on the display will be printed.
THE USB DEVICE INTERFACE
The Ohaus USB Device Interface is a unique solution to
the problem of connecting a scale to a computer using
a Universal Serial Bus (USB). USB devices are categorized
into classes such as disk drives, digital cameras, printers,
etc. Scales do not have a commonly used class so the
Ohaus USB interface uses a generic interface based on
the RS-232 serial standard.
Data sent from the scale to a computer is in USB format.
The USB data is directed to a virtual port. This port then
appears as an RS-232 port to the application program.
When sending a command from a computer to the
scale, the application program sends a command to
the virtual port as if it were an RS-232 port. The computer
then directs the command from the virtual port to the
computers USB connector where the scale is connected.
The port receives the USB signal and reacts to the
command.
The USB Interface includes a CD with the software drivers
to create the required virtual port on the computer.
SYSTEM REQUIREMENTS
• PC running Windows 98, Windows 98SE, Windows ME,
Windows 2000, Windows XP or Windows 7
• Available USB port (Type A, 4-pin, female)
PAGE 31 OF 105
USB CONNECTION
The scale's USB Device port terminates with a 4-pin,
female, USB Type B connector. A USB Cable (type B/male
to type A/male) is required (not supplied).
1.
Ensure that the scale is powered on and working
properly.
2. Power on the computer and verify that its USB port is
enabled and working properly.
3. Plug the cable's USB connectors into the computer's
USB Host
USB port and the scale's USB port. Windows should
detect a USB device and the New Hardware Wizard
will be initialized.
USB Device
VIRTUAL PORT SOFTWARE INSTALLATION
1.
Insert the supplied CD into the computer's CD
drive. Different versions of Windows have slightly
different steps to load the driver that is on the CD. In
all versions the New Hardware Wizard guides you
through the required steps to select the driver that is
located on the CD. (See Figure 94)
Figure 94
2. After clicking Finish, the virtual port should be ready
for use. Windows typically adds the virtual port in
sequence after the highest number COM port. For
example, on PC's equipped with up to 4 COM ports,
the virtual port will be COM5.
Example of Windows XP Hardware Wizard
NOTE: When using the USB interface with
programs that limit the number of COM port
designations (e.g. Ohaus MassTracker allows
only COM1, 2, 3, & 4), it may be necessary
to assign one of these port numbers to the
new virtual port. This can be done in the Port
Settings of the Device Manager utility, found in
the Windows Control Panel.
0721 IH-7991