Programming instructions

122 Error Messages
Appendix B
Error Messages
Agilent 3499A/B/C Switch/Control System can be operated in either SCPI mode or 3488A mode. The error
messages are different in different system modes. This Appendix lists all these error messages.
In SCPI Mode
• 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. When you have read all errors from the queue, the ERROR
annunciator turns off and the errors are cleared. The instrument beeps once each time an error is generated.
• If more than 10 errors have occurred, 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 instrument responds with +0, “No error”.
• The error queue is cleared by the *CLS (clear status) command or when power is cycled. The errors are
also cleared when you read the queue. The error queue is not cleared by an instrument reset (
*RST
command) or a card/module reset (
SYSTem:CPON command).
• Front-Panel Operation:
If the ERROR annunciator is on, press View to view the errors stored in the queue. Use the knob to scroll
through the error numbers. Press the arrow key (right) to view the text of the error message. All errors are
cleared when you exit the menu.
• Remote Interface Operation:
SYSTem:ERRor? Read and clear one error from the error queue
Errors have the following format (the error string may contain up to 80 characters):
-113, “Undefined header”.
01:ERR -113
First error in queue Error code