Agilent Technologies Agilent 34980A, Руководство по обслуживанию

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82 34980A Service Guide
4
Troubleshooting and Diagnostics
Instrument Errors
A record of up to 20 errors can be stored in the instrument's error queue. Each remote
interface I/O session (i.e., GPIB, USB, LAN, etc.) has its own interface-specific error
queue. Errors appear in the error queue of the I/O session that caused the error. For
example, if an error was generated by a command sent over the GPIB interface, send this
command from GPIB to read the error queue.
The instrument beeps once each time a command syntax or hardware error is generated.
The front-panel ERROR annunciator turns on when one or more errors are currently
stored in the error queue.
A special global error queue holds all power-on and hardware-related errors (e.g.,
over-temperature, Safety Interlock, etc.).
Errors are retrieved in first-in-first-out (FIFO) order. The first error returned is the first
error that was stored. Once you have read all of the interface-specific errors, the errors in
the global error 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. To
read the error queue from the front panel, use the View key.
Error conditions are also summarized in the Status Byte Register.

For more information on the SCPI Status System for the Agilent 34980A, see Status
System Introduction.
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).
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