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7-4-3 Status Reporting
The meter status registers conform to the SCPI and IEEE-488.2 standards.
! Status Byte Register ( STB)
Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0
OPER RQS/ MSS ESB MAV QUES ERRQ 0 0
Bit 0 - 1 are not used.
Bit 2 ( ERRQ ) - This bit indicates whether or not the Error Queue is empty.
It
’s set to 1 when the Error Queue is not empty.
Bit 3 ( QUES ) - Summarizes the Questionable Data/Signal Status Event
Register. It
’s set to 1 when one or more enable Questionable
Event Register are set to TRUE.
Bit 4 ( MAV ) - Summarizes the Output Queue. It
’s set to 1 when the Output
Queue is not empty.
Bit 5 (ESB ) - Summarizes the Standard Event Status Register ( ESR ).
It
’s set to 1 when one or more enable ESR bits are 1.
Bit 6 ( RQS
MSS ) - Requesting service and Master summary status. When
RQS bit is set to 1, the meter asserts the SRQ control line on the
IEEE-488 interface. You can do a serial poll to read the Status Byte
Register. When *STB? is used to read the Status Byte Register, the
MSS bit indicates the Master summary status.
Bit 7 (OPER) - Summarizes the Operation Status Event Register. It
’s set to 1,
when one or more enable Operation Status Event Register are set to
TRUE.
Note : 1. The Status Byte Register can be read with either a serial poll or the *
STB? query.
2. The register is cleared at power up.
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