Keithley 708B Reference Manual page 439

Section 7: Command reference
status.request_event
This attribute stores the service request (SRQ) event register.
Type TSP-Link accessible
Attribute (R) Yes
Usage
requestSRQEventRegister = status.request_event
requestSRQEventRegister
Details
This read-only attribute's value is returned as a decimal value. The binary equivalent of the value indicates which
register bits are set. In the binary equivalent, the least significant bit is bit B0, and the most significant bit is bit
B7. For example, if a value of 1.29000e+02 (which is 129) is read as the value of the condition register, the
binary equivalent is 10000001. This value indicates that bit B0 and bit B7 are set.
B7
Most
significant
bit
1
The returned value can indicate one or more status events occured.
The following table contains descriptions of the bits:
Bit Value
B0 status.MEASUREMENT_SUMMARY_BIT
status.MSB
B1
status.SYSTEM_SUMMARY_BIT
status.SSB
B2
status.ERROR_AVAILABLE
status.EAV
B3 status.QUESTIONABLE_SUMMARY_BIT
status.QSB
B4
status.MESSAGE_AVAILABLE
status.MAV
B5 status.EVENT_SUMMARY_BIT
status.ESB
B6 Not used.
B7
status.OPERATION_SUMMARY
status.OSB
7-186
Affected by
Not applicable
The request event register's status in decimal form. A zero (0) indicates
no bits set. Other decimal values indicate various bit settings.
B6 B5
> >
0 0
Models 707B and 708B Switching Matrix Reference Manual
Where saved
Not saved
B4 B3
> >
0 0
Description
Set summary bit indicates that an enabled measurement
event has occurred.
Bit 0 decimal value: 1
Set summary bit indicates that an enabled system
event has occurred.
Bit 1 decimal value: 2
Set summary bit indicates that an error or status message
is present in the Error Queue.
Bit 2 decimal value: 4
Set summary bit indicates that an enabled questionable
event has occurred.
Bit 3 decimal value: 8
Set summary bit indicates that a response message is
present in the Output Queue.
Bit 4 decimal value: 16
Set summary bit indicates that an enabled standard event
has occurred.
Bit 5 decimal value: 32
Not applicable.
Set summary bit indicates that an enabled operation event
has occurred.
Bit 7 decimal value: 128
Default value
0
B2 B1
> >
significant
0 0
707B-901-01 Rev. A / August 2010
B0
Least
bit
1