SC-USB USB to CS I/O Opto-isolated Interface
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6. Troubleshooting
6.1 Installation
If when installing the SC-USB the Hardware installation wizard is not
displayed immediately, try rebooting the PC with the SC-USB plugged in or
run the Add Hardware option in the Control Panel. If the wizard still does not
appear, it is possible that drivers are already installed for the SC-USB; check
using the Device Manager.
The SC-USB uses a chipset made by FTDI. Many other USB devices also use
this chipset. As a consequence, the SC-USB and other FTDI devices may
share some common driver files. To ensure that the latest files are used, install
the SC-USB after the other devices are installed. Also be aware that
re-installing an older device last may result in unreliability, as older drivers
may overwrite the newer ones without any warning.
6.2 Software Settings
Generally, no specific settings are required to use the SC-USB with Campbell
Scientific software. The datalogger should be entered in the device map as if it
were directly connected to the COM port assigned to the SC-USB. The baud
rate setting has no effect on the speed that the SC-USB communicates with the
datalogger. This is normally determined automatically. The 21X and CR7 and
non-PakBus TD dataloggers do not support automatic baud rate detection. In
these cases the SC-USB needs to be set to a fixed baud rate. This can either be
done using the SC-USB utility program (see Section
(p. 13)
) or if your software package supports it;
for example by using the ‘Generic modem’ option of
LoggerNet
, the baud rate
can be set by sending a single character code at the start of each call to the
datalogger. The codes are shown in the table below.
ASCII
Character
Baud Rate
1
9600
2
38400
3
57600
4
115200
5
76800
6
115200
The SC-USB can be left in auto mode; the numeric characters will not be
echoed.
If using the generic modem option of
LoggerNet
, you would enter a generic
modem between the COM port and the datalogger, and enter T"1" in the dial
script to force the baud rate to 9600 baud; the other hardware settings can be
left at their default values.
Setting the baud rate using the latter method is useful if you use the SC-USB to
move between a number of different types of dataloggers and wish to avoid
having to reconfigure it too often.
