Keithley 2600a series, Reference Manual, Page: 520 / 696

19-198 Return to Section Topics 2600AS-901-01 Rev. B / September 2008
Section 19: Remote Commands Series 2600A System SourceMeter® Instruments Reference Manual
Remarks • These attributes are used to read or write to the standard event status registers.
• Reading a status register returns a value. The binary equivalent of the returned value indicates
which register bits are set. The least significant bit of the binary number is bit 0, and the most
significant bit is bit 15.
• For example, assume value 9 is returned for the enable register. The binary equivalent is
0000000000001001. This value indicates that bit 0 (OPC) and bit 3 (DDE) are set.
• The used bits of the standard event status register are described as follows:
• Bit B0, Operation Complete (OPC) : Set bit indicates that all pending selected instrument
operations are completed and the SourceMeter instrument is ready to accept new
commands. The bit is set in response to an *OPC command. The ICL function
opc()
can be
used in place of the *OPC command. See Appendix C for details on *OPC
• Bit B2, Query Error (QYE) : Set bit indicates that you attempted to read data from an empty
Output Queue.
• Bit B3, Device-Dependent Error (DDE) : Set bit indicates that an instrument operation did
not execute properly due to some internal condition.
• Bit B4, Execution Error (EXE) : Set bit indicates that the SourceMeter instrument detected
an error while trying to execute a command.
• Bit B5, Command Error (CME) : Set bit indicates that a command error has occurred.
Command errors include:
IEEE-488.2 syntax error: SourceMeter instrument received a message that does not follow
the defined syntax of the IEEE-488.2 standard.
Semantic error: SourceMeter instrument received a command that was misspelled or
received an optional IEEE-488.2 command that is not implemented.
The instrument received a Group Execute Trigger (GET) inside a program message.
• Bit B6, User Request (URQ) : Set bit indicates that the LOCAL key on the SourceMeter
instrument front panel was pressed.
• Bit B7, Power ON (PON ): Set bit indicates that the SourceMeter instrument has been turned
off and turned back on since the last time this register has been read.
Details See Standard Event Register in Appendix C .
Example Sets the PON bit of the standard event status enable register:
status.standard.enable = status.standard.PON