34410A/11A/L4411A User’s Guide 85
Features and Functions 2
Error Conditions
When the front panel ERROR annunciator turns on (34410A/11A), one or more
command syntax or hardware errors have been detected. A record of up to 20 errors can
be stored in the instrument’s error queue.
• The instrument (34410A/11A) beeps once each time a command syntax or hardware
error is generated.
• Each remote interface I/O session (for example, GPIB, USB, LAN) has its own
interface–specific error queue.
• A special global error queue holds all power–on and hardware– related errors (for
example, over–temperature).
• Errors are retrieved in first–in–first–out (FIFO) order. The first error returned is the
first error that was stored. Errors are cleared as you read them. Once you have read all
of the interface–specific errors, the errors in the global queue are retrieved.
• Errors are cleared as you read them. When you have read all errors from the
interface–specific and global error queues, the ERROR annunciator turns off and the
errors are cleared.
• If more than 20 errors have occurred, the last error stored in the queue (the most
recent error) is replaced with
–350,”Error 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 instrument responds with
+0,“No error”.
• The front panel reports errors from all I/O sessions as well as the global error queue.
• Both the interface–specific and global error queues are cleared by the *CLS (Clear
Status) command and when power is cycled. The errors are also cleared when you
read the error queue. The error queue is not cleared by a Factory Reset (*RST)
command or an Instrument Preset (SYSTem:PRESet) command.
Reading the Error Queue
You can read the error queue either from the front panel, or from the remote interface.
• Front Panel Operation: Press
UTILITY MENU > SCPI ERRORS
Scroll through the errors using the navigation keypad. Press to clear all errors
from the queue.
• Remote Interface Operation: The following command reads and clears one error
from the error queue in first–in–first–out order.
SYSTem:ERRor[:NEXT]?
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