Keithley 2000 User Manual

Status Byte and Service Request (SRQ)
Service request is controlled by two 8-bit registers: the Status Byte Register and the Service
Request Enable Register. Figure 4-10 shows the structure of these registers.
Status Summary Messages
* STB?
Serial Poll
OSB
(B7)
RQS
(B6)
MSS
ESB
(B5)
MAV
(B4)
QSB
(B3)
EAV
(B2)
(B1) (B0)
OR
* SRE
* SRE?
Status Byte
Register
Service
Request
Enable
Register
OSB = Operation Summary Bit
MSS = Master Summary Status
RQS = Request for Service
ESB = Event Summary Bit
MAV = Message Available
QSB = Questionable Summary Bit
EAV = Error Available
MSB = Measurement Summary Bit
& = Logical AND
OR = Logical OR
OSB
(B7) (B6)
ESB
(B5)
MAV
(B4)
QSB
(B3)
EAV
(B2)
(B1) (B0)
&
&
&
&
&
MSB
MSB
&
Service
Request
Generation
Read by Serial Poll
Read by *STB?
Remote Operation 4-25
Figure 4-10
Status byte and
service request
(SRQ)

Keithley 2000 Specifications

General

Brand	Keithley
Model	2000
Category	Multimeter
Language	English