Kikusui KHA3000, Руководство по эксплуатации, Страница: 339 / 392

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KHA3000
339
Rem
ote Control
IEEE 488.2 Register Model
Status Byte Register
The status byte register stores the STB and RQS (MSS) messages as defined in the IEEE
488.1 standard. The status byte register can be read by using IEEE 488.1 serial polling or
IEEE 488.2 common command *STB?.
When serial polling is performed, bit 6 responds with Request Service (RQS). The status byte
value is not changed by serial polling.
*STB? causes the content of the status byte register and Master Status Summary (MSS) to
be sent to equipment.
*STB? does not change the status byte, MSS or the RQS.
Bit Bit
weight Bit name Description
0 1 Reserved Reserved for future use by the IEEE 488. The bit
value is posted as zero.
1 2 Reserved
2 4 Error/Event Queue If data exists in the error or event queue, this bit
is set to
“ true ” .
3 8 Questionable Status Register
(QUES) This bit is set to “ true ” when a bit in the
QUEStionable event status register is set and the
corresponding bit in the QUEStionable status
enable register is
“ true .”
4 16 Message Available (MAV) This bit is set to “ true ” when a request from the
digital programming interface has been received
and the system is ready for data byte output.
5 32 Standard Event Status Bit
Summary (ESB) This bit is set to “ true ” when a bit is set in the
event status register.
6 64 Request Service (RQS) This bit is set to “ true ” when a bit in the service
request enable register is set and the bit
corresponds to a bit in the status byte.
The GPIB SRQ line is set.
Master Status Summary (MSS) This bit is set when one of the status byte bits is
1 and the corresponding bit in the service
request enable register is also set to 1.
7 128 Operation Status Register
(OPER) This bit is set to “ true ” when a bit in the
OPERation event status register is set and the
corresponding bit in the OPERation status
enable register is set.
8-15 – NOT USED Not used