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This chapter is an introduction to the FPM-8220 Fiber Optic Power Meter LabVIEW Instrument
Driver's common errors. This chapter also includes:
Troubleshooting
NI Spy
Errors
Broken Gray Arrow: If a broken gray arrow appears in the toolbar (where the white arrow
should be) and the white arrow is not there, this indicates an error in the code. Click on the
broken arrow to see a list of the errors in the sub-VI. Enter the Block Diagram to correct these
errors.
Troubleshooting
I want to configure the COM port, but the correct port is not appearing in Measurement &
Automation Explorer.
In Measurement & Automation Explorer (MAX), select View and then Refresh. The COM port to
which the instrument is connected will appear.
The instrument that I want to configure is connected to a computer that I am remotely
accessing.
The COM port needs to be configured on the computer to which the instrument is connected.
The VISA address that I want to select in a sub-VI does not appear in the drop down menu of
the Front Panel.
Select Refresh at the bottom of the drop down list and the VISA address will appear.
NI Spy
NI Spy is a free program that is available on the National Instruments website. When the application
is opened and the capture is started, every interaction between the computer and the instrument is
recorded. All errors are documented and explained.
July 2011
Errors and Troubleshooting
9
Chapter 3:
FPM-8220 LabVIEW Manual
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