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Relay Multiplexer Command Reference 67

:ERRor?

SYSTem:ERRor? returns the error numbers and corresponding error messages in

the error queue of a switchbox. See Appendix C for a listing of the switchbox error

numbers and messages.

Comments • Error Numbers/Messages in the Error Queue: Errors generated by a

switchbox store an error number and corresponding error message in the error

queue. The error number is always a negative number. Each error message can

be up to 255 characters long.

• Clearing the Error Queue: An error number/message is removed from the

queue each time the

SYSTem:ERRor? command is sent. The errors are cleared

first-in, first-out. When the queue is empty, each following

SYSTem:ERRor?

command returns

0, "No error". To clear all error numbers/messages in the

queue, execute

*CLS.

• Maximum Error Numbers/Messages in the Error Queue: The queue holds

a maximum of 30 error numbers/messages for each switchbox. If the queue

overflows, the last error number/message in the queue is replaced by -350,

"Too many errors". The oldest error numbers/messages remain in the queue

and the most recent are lost.

Example Reading the Error Queue

SYST:ERR?

Query the error queue.

1 2 ... 61 62 63 64 65 66 67 68 69 70 71 ... 92 93

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Agilent Technologies E1345A Manuel d'utilisateur Page 66