Agilent 34980A Multifunction Switch/Measure Unit *34980-90005*
Agilent 34980A Multifunction Switch/Measure Unit *34980-90005*
Agilent 34980A Multifunction Switch/Measure Unit *34980-90005*
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3 Features and Functions<br />
Error Conditions<br />
When the front panel ERROR annunciator turns on, one or more command<br />
syntax or hardware errors have been detected. A record of up to 20 errors<br />
can be stored in the instrument’s error queue. Each remote interface I/O<br />
session (i.e., GPIB, USB, LAN, etc.) has its own interface- specific error<br />
queue. Errors appear in the error queue of the I/O session that caused <br />
the error (the front panel reports errors from all I/O sessions).<br />
For a complete listing of the error messages, see the <strong>Agilent</strong> <strong>34980A</strong><br />
Programmer’s Reference Help file, located on the Product Reference<br />
CD- ROM shipped with the instrument.<br />
The instrument beeps once each time a command syntax or hardware<br />
error is generated.<br />
A special global error queue holds all power- on and hardware- related<br />
errors (e.g., over- temperature, Safety Interlock, etc.).<br />
Errors are retrieved in first- in- first- out (FIFO) order. The first error<br />
returned is the first error that was stored. Errors are cleared as you<br />
read them. Once you have read all of the interface- specific errors, the<br />
errors in the global queue are retrieved.<br />
Errors are cleared as you read them. When you have read all errors<br />
from the interface- specific and global error queues, the ERROR<br />
annunciator turns off and the errors are cleared.<br />
If more than 20 errors have occurred, the last error stored in the queue<br />
(the most recent error) is replaced with - 350,“Error queue overflow”.<br />
No additional errors are stored until you remove errors from the queue.<br />
If no errors have occurred when you read the error queue, the<br />
instrument responds with +0,“No error”.<br />
The front panel reports errors from all I/O sessions as well as the<br />
global error queue.<br />
The interface- specific and global error queues are cleared by the *CLS<br />
(Clear Status) command and when power is cycled. The errors are also<br />
cleared when you read the error queue. The error queue is not cleared<br />
by a Factory Reset (*RST command) or an Instrument Preset<br />
(SYSTem:PRESet command).<br />
Front Panel Operation: View > ERROR QUEUE<br />
Use the knob to scroll through the errors. Press the right arrow key to<br />
view the text of the error message. All errors are cleared when you exit<br />
the menu.<br />
Remote Interface Operation: The following command reads and clears one<br />
error from the queue.<br />
SYSTem:ERRor?<br />
150 <strong>Agilent</strong> <strong>34980A</strong> Mainframe User’s Guide