Keithley 2657A User Manual

Section 7: TSP command reference Model 2657A High Power System SourceMeter® Instrument Reference Manual
7-310 2657A-901-01 Rev. B/December 2012
For information about .condition, .enable, .event, .ntr, and .ptr registers, refer to Status register set contents (on
page E-1) and Enable and transition registers
(on page E-19). The individual bits of this register are defined in
the following table.
Bit Value Description
B0
status.MEASUREMENT_SUMMARY_BIT
status.MSB
Set summary bit indicates that an enabled event in the
Measurement Event Register has occurred.
Bit B0 decimal value: 1
B1
status.SYSTEM_SUMMARY_BIT
status.SSB
Set summary bit indicates that an enabled event in the
System Summary Register has occurred.
Bit B1 decimal value: 2
B2
status.ERROR_AVAILABLE
status.EAV
Set summary bit indicates that an error or status message
is present in the Error Queue.
Bit B2 decimal value: 4
B3
status.QUESTIONABLE_SUMMARY_BIT
status.QSB
Set summary bit indicates that an enabled event in the
Questionable Status Register has occurred.
Bit B3 decimal value: 8
B4
status.MESSAGE_AVAILABLE
status.MAV
Set summary bit indicates that a response message is
present in the Output Queue.
Bit B4 decimal value: 16
B5
status.EVENT_SUMMARY_BIT
status.ESB
Set summary bit indicates that an enabled event in the
Standard Event Status Register has occurred.
Bit B5 decimal value: 32
B6 Not used Not applicable
B7
status.OPERATION_SUMMARY_BIT
status.OSB
Set summary bit indicates that an enabled event in the
Operation Status Register has occurred.
Bit B7 decimal value: 128
In addition to the above constants, requestEventRegister can be set to the decimal equivalent of the bits
set. When more than one bit of the register is set, requestEventRegister contains the sum of their decimal
weights. For example, if 129 is returned, bits B0 and B7 are set (1 + 128).
Bit B7 B6 B5 B4 B3 B2 B1 B0
Binary value 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1
Decimal 128 64 32 16 8 4 2 1
Weights
(2
7
) (2
6
) (2
5
) (2
4
) (2
3
) (2
2
) (2
1
) (2
0
)
Example
requestEventRegister = status.request_event
print(requestEventRegister)
Reads the status request event register.
Sample output:
1.29000e+02
Converting this output (129) to its binary
equivalent yields 1000 0001.
Therefore, this output indicates that the set bits
of the status request event register are presently
B0 (MSB) and B7 (OSB).
Also see
status.condition (on page 7-248)
status.system.*
(on page 7-313)
Status byte and service request (SRQ)
(on page E-15)

Keithley 2657A Specifications

General

Brand	Keithley
Model	2657A
Category	Measuring Instruments
Language	English