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252 Chapter 12
Troubleshooting
Error Messages
Error Message File
A complete list of error messages is provided in the file errormessages.pdf, on the CDROM supplied
with your instrument.
In the error message list, an explanation is generally included with each error to further clarify its
meaning. The error messages are listed numerically. In cases where there are multiple listings for the
same error number, the messages are in alphabetical order.
Error Message Format
When accessing error messages through the front panel display error queue, the error numbers,
messages and descriptions are displayed on an enumerated (“1 of N”) basis.
Error messages appear in the lower-left corner of the display as they occur.
Error Message Types
Events do not generate more than one type of error. For example, an event that generates a query
error will not generate a device-specific, execution, or command error.
Query Errors (–499 to –400) indicate that the instrument’s output queue control has detected a
problem with the message exchange protocol described in IEEE 488.2, Chapter 6. Errors in this class
set the query error bit (bit 2) in the event status register (IEEE 488.2, section 11.5.1). These errors
correspond to message exchange protocol errors described in IEEE 488.2, 6.5. In this case:
• Either an attempt is being made to read data from the output queue when no output is either
present or pending, or
• data in the output queue has been lost.
Device Specific Errors (–399 to –300, 201 to 703, and 800 to 810) indicate that a device operation
did not properly complete, possibly due to an abnormal hardware or firmware condition. These codes
are also used for self-test response errors. Errors in this class set the device-specific error bit (bit 3)
in the event status register (IEEE 488.2, section 11.5.1).
Explanation provided in the Error Message List
(This is not displayed on the instrument)