Keithley 2601 Reference Manual page 337

Series 2600 System SourceMeter® Instruments Reference Manual
status.condition
Attribute Status byte register.
Reads the status byte register:
Usage
statbyte = status.condition
Remarks • This attribute is used to read the status byte, which is returned as a numeric 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 7.
• For example, assume value 129 is returned for the enable register. The binary equivalent
is 10000001. This value indicates that bit B0 (MSB) and bit B7 (OSB) are set.
• The bits of the status byte register are described as follows:
• Bit B0, Measurement Summary Bit (MSB) – Set summary bit indicates that an
enabled measurement event has occurred.
• Bit B1, System Summary Bit (SSB) – Set summary bit indicates that an enabled
system event has occurred.
• Bit B2, Error Available (EAV) – Set summary bit indicates that an error or status
message is present in the Error Queue.
• Bit B3, Questionable Summary Bit (QSB) – Set summary bit indicates that an
enabled questionable event has occurred.
• Bit B4, Message Available (MAV) – Set summary bit indicates that a response
message is present in the Output Queue.
• Bit B5, Event Summary Bit (ESB) – Set summary bit indicates that an enabled
standard event has occurred.
• Bit B6, Request Service (RQS)/Master Summary Status (MSS) – Set bit indicates
that an enabled summary bit of the Status Byte Register is set. Depending on how it is
used, Bit B6 of the Status Byte Register is either the Request for Service (RQS) bit or
the Master Summary Status (MSS) bit:
• When using the GPIB serial poll sequence of the SourceMeter to obtain the status byte
• When using status.condition or the *STB? common command to read the status
• Bit B7, Operation Summary (OSB) – Set summary bit indicates that an enabled
operation event has occurred.
Details See "Status byte and service request
Example Reads the status byte:
statbyte = status.condition
print(statbyte)
Output: 1.29000e+02
The above output indicates that bits B0 (MSS) and B7 (OSB) are set.
2600S-901-01 Rev. C / January 2008
(serial poll byte), B6 is the RQS bit.
byte, B6 is the MSS bit.
Return to
(SRQ)" in Appendix D.
Section Topics
Section 12: Instrument Control Library
12-77