Keithley 3700 series Reference Manual page 331

Series 3700 System Switch/Multimeter Reference Manual
status.condition
Remarks
Example
Document Number: 3700S-901-01 Rev. A / August 2007
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 Series 3700 to obtain the status
byte (serial poll byte), B6 is the RQS bit.
- When using status.condition or the *STB? common command to read the status
byte, B6 is the MSS bit.

Bit B7, Operation Summary (OSB) - Set summary bit indicates that an enabled
operation event has occurred.
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.
Section 9: Instrument Control Library (ICL)
9-187