Chapter 6 387
Error Messages
Error Message Descriptions
Query Error Messages
[−499 to −400]
An error number in the range [−499 to −400] indicates the instrument
has found a problem when trying to respond to a SCPI query. The
occurrence of any error in this class will cause the error query bit (bit 2)
to be set in the event status register. If a query error occurs 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.
Query Error Message Descriptions
(Number) Description
(-440) Query UNTERMINATED after indefinite response
Indicates that a query was received in the same
program message after a query requesting an indefinite
response was executed (see IEEE 488.2, 6.3.7.5).
(-430) Query DEADLOCKED
Indicates that a condition causing a DEADLOCKED
query error occurred (see IEEE 488.2, 6.3.1.7) (for
example, both the input buffer and the output buffer
are full and the device cannot continue).
(-420) Query UNTERMINATED
Indicates that a condition causing an
UNTERMINATED query error occurred (see IEEE
488.2, 6.3.2.2) (for example, the device was addressed to
talk and an incomplete program message was received).
(-410) Query INTERRUPTED
Indicates that a condition causing an INTERRUPTED
query error occurred (see IEEE 488.2, 6.3.2.7) (for
example, a query was followed by DAB or GET before a
response was completely sent).
(-400) Query Error
This is a generic query error for devices that cannot
detect more specific errors. The code indicates only that
a query error as defined in IEEE 488.2, 11.5.1.1.7 and
6.3 has occurred.
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