GDM-8246 MULTIMETER
PROGRAMMER MANUAL
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53
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Queues
The output queue is included to power supplies.
Output Queue
: The DMM store query responses in the output queue by
succeeding the IEEE 488.2 protocol. If the DMM receives a new
command or query message after a message terminator, the DMM will
clear and reset this queue each time. The computer must read a query
response before it sends the next command (or query) or it loses response
to earlier queries.
Error/Event Queues
When an error or event occurs, the output queue stores the message. The
output queue stores and reports the messages on a FIFO (first in first out)
state. The
SYSTem:ERRor?
query reads the next item from the output
queue. If output queue overflows, the error message is –350,
“Queue
overflow”
; the queue can’t store or report succeeding messages till it
is read or cleared.
Error Message
Table 8 lists the SCPI error messages for the DMM.
Table 8 The error messages for the DMM:
SCPI Error Code and Description
SESR Bit
0, “No error”
-100, “Command error”
5
-200, “Execution Error”
4
-221, “Settings conflict”
4
-222, “Data out of range”
4
-350, “Queue overflow”
3
-410, “Query INTERRUPTED”
2
-420, “Query UNTERMINATED”
2
-430, “Query DEADLOCKED”
2
GDM-8246 MULTIMETER
PROGRAMMER MANUAL
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54
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