Agilent Technologies E3631-90002, User Manual, Page: 84 / 166

Chapter 4 Remote Interface Reference
System-Related Commands
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SYSTem:ERRor?
This command queries the power supply's error queue. When the front-panel
ERROR annunciator turns on, one or more command syntax or hardware
errors have been detected. Up to 20 errors can be stored in the error queue.
See “Error Messages” in chapter 5.
• Errors are retrieved in first-in-first-out (FIFO) order. The first error
returned is the first error that was stored. When you have read all errors
from the queue, the
ERROR
annunciator turns off. The power supply
beeps once each time an error is generated.
• If more than 20 errors have occurred, the last error stored in the queue
(the most recent error) is replaced with -350 , “Too many errors” . No
additional errors are stored until you remove errors from the queue. If no
errors have occurred when you read the error queue, the power supply
responds with
+0, “No error” .
• The error queue is cleared when power has been off or after a
*CLS
(clear status) command has been executed. The
*RST
(reset) command
does not clear the error queue.
SYSTem:VERSion?
This command queries the power supply to determine the present SCPI
version. The returned value is of a string in the form YYYY.V where the “Y’s”
represent the year of the version, and the “V” represents a version number for
that year (for example, 1995.0).
*IDN?
This query command reads the power supply's identification string. The
power supply returns four fields separated by commas. The
first
field is the
manufacturer's name, the
second
field is the model number, the
third
field is
not used (always “0”), and the
fourth
field is a revision code which contains
three numbers. The first number is the firmware revision number for the
main
power supply processor; the second is for the
input/output
processor;
and the third is for the
front-panel
processor.
The command returns a string with the following format (be sure to
dimension a string variable with at least
40 characters ):
HEWLETT-PACKARD,E3631A,0,X.X-X.X-X.X