User manual

90 Relay Multiplexer Command Reference Chapter 3
SYSTem: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 switchbox error numbers and messages.
Comments Error Numbers/Messages in the Error Queue: Each error generated by a
switchbox stores an error number and corresponding error message in
the error queue. The 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 the *CLS command.
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 least recent error numbers/messages
remain in the queue and the most recent are discarded.
*RST Condition: *RST does not clear the error queue.