Owner's manual

166 Chapter 5 Using GPIB Interface
The following figure illustrates IEEE-488 status reporting.
Status byte bit Definition
MAV Message available. Indicates that at least one complete response is present in
the output buffer.
ESB Event status bit. Indicates that one of the enabled conditions in the Standard
Event Status register is set.
MSS Master summary status. Indicates that the generator has a reason for requesting
service.
RQS Request service. This bit is read only by executing a serial poll of the generator.
&
&
&
&
&
&
&
&
7 6 5 4 3 2 1 0
Logical OR
7 6
ESB
MAV
2 1 0
7 6 5 4 3 2 1 0
RQS
MSS
Service
Request
Generation
7 6 5 4 3 2 1 0
&
&
&
&
&
&
&
Logical OR
Power On
User Request Command Error
Execution Error Device Dependent Error
Query Error
Request Control Operation Complete
Queue
Not-Empty
Output Queue
Standard
Event Status Register
Standard
Event Status Enable
Register
Status Byte Register
Service Request
Enable Register
3