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HP4402.book : chapter4.fm 3 Wed Apr 23 15:29:05 1997
Error Messages
Introduction
HP EPM-442A User’s Guide 4-3
Errors are retrieved in a first in first out (FIFO) order. If more than 30
errors occur, the error queue overflows and the last error in the queue is
replaced with error -350, “Queue Overflow”. Any time the queue
overflows the most recent error is discarded.
Once the errors are read they are removed from the error queue. This
opens a position at the end of the queue for a new error message, if one is
subsequently detected. When all errors have been read from the queue,
further error queries return +0, “No errors”.
To delete all the errors in the queue from the front panel press:
• , , then .
To delete all the errors in the queue remotely use:
• the *CLS (clear status) command.
The error queue is also cleared when the instrument power has been
switched off.
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