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Model 2651A High Power System SourceMeter® Instrument Reference Manual
Bit
Value
B0
status.MEASUREMENT_SUMMARY_BIT
status.MSB
B1
Not used
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
status.MASTER_SUMMARY_STATUS
status.MSS
B7
status.OPERATION_SUMMARY_BIT
status.OSB
In addition to the above constants, nodeEventRegister can be set to the decimal equivalent of the bit(s) set.
When more than one bit of the register is set, nodeEventRegister contains the sum of their decimal weights.
For example, if 129 is returned, bits B0 and B7 are set (1 + 128).
Bit
Binary value
Decimal
Weights
Example
nodeEventRegister = status.node_event
print(nodeEventRegister)
Also see
status.condition
status.system.*
Status model overview
Status byte and service request (SRQ)
2651A-901-01 Rev. A / March 2011
B7
B6
0/1
0/1
128
64
7
6
(2
)
(2
)
(on page 7-250)
(on page 7-314)
(on page E-4)
(on page E-14)
Description
Set summary bit indicates that an enabled measurement
event has occurred.
Bit B0 decimal value: 1
Not applicable
Set summary bit indicates that an error or status message
is present in the Error Queue.
Bit B2 decimal value: 4
Set summary bit indicates that an enabled questionable
event has occurred.
Bit B3 decimal value: 8
Set summary bit indicates that a response message is
present in the Output Queue.
Bit B4 decimal value: 16
Set summary bit indicates that an enabled standard event
has occurred.
Bit B5 decimal value: 32
Set bit indicates that an enabled Master Summary Status
(MSS) bit of the Status Byte register is set.
Bit B6 decimal value: 64
Set summary bit indicates that an enabled operation event
has occurred.
Bit B7 decimal value: 128
B5
B4
B3
0/1
0/1
0/1
32
16
8
5
4
3
(2
)
(2
)
(2
)
Reads the status node 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 byte condition register are presently
B0 (MSB) and B7 (OSB).
Section 7: Command reference
B2
B1
B0
0/1
0/1
0/1
4
2
1
2
1
0
(2
)
(2
)
(2
)
7-265
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Troubleshooting
