RPM Only when
checked will record only RPM from the first field and will
not record other fields. Also, this will only record RPM
values that are non-zero. This feature can be useful if you
are logging to output the file to a spreadsheet or other
third party software.
While the Log Dialog is open,
[Resume] can all be
done with the same button.
[Start] begins saving the data to a log file.
continues the saving of data
to a log file.
[Marker] function places a
sequential number in the file when you click it. This can
be helpful for data analysis.
[Browse] button allows you
to specify the location for your logs. By default, Log Files will be placed in the LOGS
sub-folder in your PC’s VCDS directory.
[Done, Close] closes the log file and exits out of the Log function.
By default, the name of the log file
will be the controller number followed by each group
number that you are logging. The name can be changed to anything you'd
like. If you re-use an existing filename, your new data will be appended
to that file.
Switch to Basic Settings is not
currently available while logging. However,
you can start a log while you're in Basic Settings. If VCDS keeps
insisting that it can't open a Log file, you're probably missing the
LOGS folder and should re-install VCDS.
Example using Microsoft Excel to view the logged data:
1. Choose group or groups that you want to view.
3. Use default file name if desired. It will append the old file if you
use a particular name more than once.
4. Click [Start]
5. Drive the car through the tests that you want to perform
6. Click [Stop]
7. Click [Done, Close] when
you're finished logging data.
Open Microsoft Excel
9. Click File->Open (change filetype to all *.*)
10. Locate the *.csv
file that you created, typically in C:\ross-tech\vcds\Logs\
11. With mouse select the columns you want to graph.
12. Click the Chart Wizard button.
13. Select XY (Scatter) and click one of the formats that has lines.
14. The chart wizard will prompt you to name axes if you want.
15. Pick, for example,
RPM values for the x-axis and IAT for the y-axis
You can also use the
[Graph] button to open up
the VC-Scope plug-in for
VCDS that allows you to replay LOG files. See the
- If you're going to use VCDS while you're driving,
please use a second person!
- Let one drive while the other observes the data, making
sure the person holding the PC is not in front of an active airbag! Obviously, do not break any laws,
speeding or otherwise while using VCDS!