14-8
Status Structure
Status Byte Register
The summary messages from the status registers and queues are used to set or clear the
appropriate bits (B0, B2, B3, B4, B5, and B7) of the Status Byte Register. These summary bits
do not latch, and their states (0 or 1) are solely dependent on the summary messages (0 or 1).
For example, if the Standard Event Register is read, its register will clear. As a result, its sum-
mary message will reset to 0, which in turn will reset the ESB bit in the Status Byte Register.
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
—
Not used.
•
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 mes-
sage is present in the Output Queue.
•
Bit B5, Event Summary Bit (ESB)
—
Set summary bit indicates that an enabled stan-
dard 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.
•
Bit B7, Operation Summary (OSB)
—
Set summary bit indicates that an enabled
operation event has occurred.
Depending on how it is used, Bit B6 of the Status Byte Register is either the Request for Ser-
vice (RQS) bit or the Master Summary Status (MSS) bit:
•
When using the serial poll sequence of the SourceMeter to obtain the status byte (a.k.a.
serial poll byte), B6 is the RQS bit. See
Serial polling and SRQ
for details on using the
serial poll sequence.
•
When using the *STB? command (Table 14-3) to read the status byte, B6 is the MSS
bit.
Содержание 6430
Страница 26: ......
Страница 32: ......
Страница 78: ...2 14 Connections ...
Страница 98: ...3 20 Basic Source Measure Operation ...
Страница 138: ...5 30 Source Measure Concepts ...
Страница 156: ...6 18 Range Digits Speed and Filters ...
Страница 168: ...7 12 Relative and Math ...
Страница 176: ...8 8 Data Store ...
Страница 202: ...9 26 Sweep Operation ...
Страница 248: ...11 22 Limit Testing ...
Страница 310: ...16 6 SCPI Signal Oriented Measurement Commands ...
Страница 418: ...17 108 SCPI Command Reference ...
Страница 450: ...18 32 Performance Verification ...
Страница 477: ...A Specifications ...
Страница 489: ...B StatusandErrorMessages ...
Страница 498: ...B 10 Status and Error Messages ...
Страница 499: ...C DataFlow ...
Страница 503: ...D IEEE 488BusOverview ...
Страница 518: ...D 16 IEEE 488 Bus Overview ...
Страница 519: ...E IEEE 488andSCPI ConformanceInformation ...
Страница 523: ...F MeasurementConsiderations ...
Страница 539: ...G GPIB488 1Protocol ...
Страница 557: ......