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Query errors
An <error/event number> in the range [–499, –400] indicates that the output
queue control of the instrument has detected a problem with the message
exchange protocol described in IEEE 488.2, chapter 6. The occurrence of any
error in this class shall cause the query error bit (bit 2) in the event status reg-
ister (IEEE 488.2, section 11.5.1) to be set. These errors correspond to mes-
sage exchange protocol errors described in IEEE 488.2, section 6.5.
One of the following is true:
• An attempt is being made to read data from the output queue when no output
is either present or pending.
• Data in the output queue has been lost.
Events that generate query errors will not generate command errors, execu-
tion errors, or device-specific errors; see the other error definitions in this sec-
tion.
Table 7-4. Query Errors (1 of 2)
Error Number
–400
–410
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Error Description [description/explanation/examples]
Query error
[This is the generic query error for devices that cannot detect more specific
errors. This code indicates only that a Query Error as defined in IEEE 488.2,
11.5.1.1.7 and 6.3 has occurred.]
Query INTERRUPTED
[Indicates that a condition causing an INTERRUPTED Query error occurred (see
IEEE 488.2, 6.3.2.3); for example, a query followed by DAB or GET before a
response was completely sent.]
Status Listings
SCPI-Defined Errors
7-15
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