4 Remote Interface Reference
140 Keysight E3633A and E3634A User’s Guide
Status Reporting Commands
See diagram “SCPI Status System” on page 133 in this chapter for detailed
information of the status register structure of the power supply.
SYSTem:ERRor?
This query command reads one error from the error queue. When the
front-panel ERROR annunciator turns on, one or more command syntax or
hardware errors have been detected. A record of up to 20 errors can be stored
in the power supply’s error queue. See Error Messages for a complete listing of
the errors in chapter 5.
– 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, “Queue overflow”. 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.
– All errors are cleared when you exit the menu or let the display time out for
about 30 seconds.
STATus:QUEStionable:CONDition?
This command queries the Questionable Status condition register to check CV
or CC mode of the power supply. The power supply returns a decimal value
which corresponds to the binary-weighted sum of all bits in the register. These
bits are not latched. If “0” is returned, the power supply is in output off or
unregulated state. If “1” is returned, the power supply is in the CC operating
mode and if “2” is returned, the power supply is in the CV operating mode. If
“3” is returned, the power supply is in failure.
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