Kikusui PLZ-30F, Operation Manuals

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PLZ-U Remote Control 6-51
Status byte register
The status byte register stores STB and RQS (MSS) messages as de fi ned by the
IEEE488.1 standard. The status byte register can be read using IEEE488.1 serial
polling or IEEE488.2 common command *STB?.
When serial polling is carried out, bit 6 responds to the request service (RSQ). The
status byte value is not changed by serial polling.
The *STB? query command makes the device transmit the contents of the status
byte register and the master summary status (MSS) summary message.
The *STB? query command does not change status bytes MSS and RQS.
Table 6-14 Status byte summary register
IEEE 488.2 status event commands
See section 6.5.1, “IEEE 488.2 Common Commands.”
Bit Bit Weight Bit Name Description
0 1 Reserved
Reserved for future use by the IEEE. The bit value is noti fi ed as zero.
1 2 Reserved
2 4 Csummary (CSUM) This bit is set to true when a bit is set in the CSUM status register.
3 8
Questionable Status Register
(QUES) This bit is set to true when a bit is set in the QUEStionable event status reg-
ister 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 is received from the digital program-
ming interface and the PLZ-U is ready to output the data byte.
5 32
Standard Event Status Bit Sum-
mary (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 is set in the service request enable register,
and the corresponding bit exists in the status byte.
The SRQ line is set on the GPIB, and SRQ illuminates.
Master Status Summary (MSS) Set by one of the following.
Status byte bit 0 and service request enable register bit 0
Status byte bit 1 and service request enable register bit 1
Status byte bit 2 and service request enable register bit 2
Status byte bit 3 and service request enable register bit 3
Status byte bit 4 and service request enable register bit 4
Status byte bit 5 and service request enable register bit 5
Status byte bit 7 and service request enable register bit 7
7 128
Operation Status Register
(OPER) This bit is set to true when a bit is set in the OPERation event status register
and the corresponding bit in the OPERation status enable register is set.
8-15
Not Used