User`s guide

34410A/11A/L4411A User’s Guide 83
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.
UG_ED5.book Page 83 Thursday, March 1, 2012 11:28 AM