User`s manual

Appendix F
Remove pre-release driver versions on a Windows
XP operating system
1. Click Start > Control Panel > Add or Remove Programs.
2. Select 770 USB Serial Converter Drivers from the list, and then click Change/
Remove.
If 770 USB Serial Converter Drivers is not on the list, proceed to Step 4.
3. Follow the prompts on the uninstallation window, then click Finish.
4. If necessary, uninstall the drivers using Windows Device Manager:
a. Launch Windows Device Manager (Start > Run, type devmgmt.msc, and
click OK).
b. Expand Ports (COM & LPT).
c. Connect the USB Fieldbus Interface to the computer through the USB
port and wait a few seconds to see if 770 Fieldbus Interface (COMxx)
appears on the list. If it does not, proceed to Step 5.
d. Right-click 770 Fieldbus Interface (COMxx), and select Uninstall.
e. Click OK to confirm the driver removal.
f. Expand Universal Serial Bus controllers, right-click 770 Fieldbus Interface,
and select Uninstall.
g. Click OK to confirm the driver removal.
5. After removing previous driver versions, install current drivers manually.
Follow the procedure in Appendix D.
6. After installing current drivers, open Windows Device Manager.
7. Expand Ports (COM & LPT), right-click 770 Fieldbus Interface (COMxx), and
select Properties.
8. From the Port Settings tab, select Advanced.
9. From the BM Options section, set the Latency Timer value to 1 and click
OK.
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