Xantrex XTR 33-25, Operating Manual

Page: 176 / 286

Remote Operation
5-50 M370046-01
SCPI Error/Event Queue
The error/event queue contains items that include a numerical and textual
description of the error or event. Querying for the full queue item (for
example, with
SYSTem:ERRor[:NEXT]?
) will return a response with
the following syntax:
<Error/Event Number>, "<Error/Event
Description>;<Optional Device Dependent Info>"
The <Error/event_number> is a unique integer in the range [-32768,
32767]. All positive numbers are instrument-dependent. All negative
numbers are reserved by the SCPI standard with certain standard error/
event codes described in the SCPI 1999 standard document. The value,
zero, is also reserved to indicate that no error or event has occurred.
The second parameter of the full response is a quoted string containing an
<Error/event_description> followed by optional <Device-dependent
info> text. Each <Error/event_number> has a unique and fixed <Error/
event_description> associated with it.
The maximum string length of <Error/event_description> plus <Device-
dependent_info> is 255 characters.
As errors and events are detected, they are placed in a queue. This queue
is first in, first out. If the queue overflows, the last error/event in the
queue is replaced with error:
-350,"Queue overflow
Any time the queue overflows, the least recent errors/events remain in the
queue, and the most recent error/event is discarded. The error queue
implemented in the XTR is capable of holding 4 errors.
When the error queue is not empty the error queue bit in the Status
register will be set.
Querying For the Errors
Executing a query of the event queue will respond with the oldest error
currently on the queue. This error is removed. The response format is
discussed in the error/event queue description section.
Command:
[:]SYSTem:ERRor[:EVENt]?
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