B-2 Status and Error Messages Models 2500 and 2502 User’s Manual
Introduction
This Appendix contains a summary of status and error messages, which status register bits
are set when messages occur, and methods to avoid or eliminate most common SCPI
errors.
Status and error messages
Table B-1 summarizes status and error messages, which are stored in the Error Queue.
Each message is preceded by a code number. Negative (-) numbers are used for SCPI-
defined messages, and positive (+) numbers are used for Keithley-defined messages. Note
that error and status conditions will also set specific bits in various status registers, as sum-
marized in Table B-1.
Section 14 has detailed information on registers and queues. Briefly, you can use the fol-
lowing queries to obtain error and status information:
• :SYST:ERR? — reads Error Queue.
• *ESR? — reads Standard Event Status Register.
• :STAT:OPER? — reads Operation Event Register.
• :STAT:MEAS? — reads Measurement Event Register.
• :STAT:QUES? — reads Questionable Event Register.
NOTE SCPI-confirmed messages are described in volume 2: Command Reference of
the Standard Commands for Programmable Instruments. Refer to the
:SYSTem:ERRor? command.
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