Remote Operation
5-32 M370430-01 Rev F
Status Byte
The Status byte register contains the STB and RQS (MSS) messages as
defined in 488.1. You can read the status byte register using a 488.1
serial poll or the 488.2 *STB? common command.
The *STB? query causes the device to send the contents of the Status
Byte Register and the Master Summary Status (MSS) summary
message. The *STB? query does not alter the status byte, MSS, or RQS.
Table 5-10 Status Byte Summary Register
Set if any errors are present in the Error/Event queue.
Questionable Status
Register (QSR)
Set if any bits are set in the Questionable Status Event
register.
Indicates whether the output queue is empty. MAV is
TRUE if the device is ready to accept a request from the
controller.
Standard Event Status Bit
Summary (ESB)
A summary of the Standard Event Status Register.
Request Service (RQS) /
Master Status Summary
(MSS)
Not Implemented / MSS indicates that the device has at
least one reason for requesting service.
Operation Status Register
(OSR)
Present if a bit is set in the Operation status register.
Error/Event Queue (ERR)
This bit is TRUE if any errors are present in the Error/Event Queue.
Questionable Status Register Summary (QSR)
This bit is TRUE when a bit in the Questionable Event Status Register is
set and its corresponding bit in the Questionable Status Enable Register
is TRUE.
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