Chapter 3 Front-Panel Operation
System-Related Operations
47
3
Error Conditions
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 chapter 5 “Error Messages”, starting on page
115 for a complete listing of the errors.
• 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 when you operate the power supply over the
remote interface, 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” over the remote interface or “NO
ERRORS” from the front panel.
• 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.
• Front-panel operation:
If the ERROR annunciator is on, press the key repeatedly to read the errors
stored in the queue. All errors are cleared when you read all errors.
• Remote interface operation:
SYSTem:ERRor? Reads one error from the error queue
Errors have the following format (the error string may contain up to 80 characters).
-113,"Undefined header"
ERROR -113
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