Keithley SourceMeter 2410

2400 Series SourceMeter
®
User’s Manual Status Structure 15-7
Status byte and service request (SRQ)
Service request is controlled by two 8-bit registers; the Status Byte Register and the Ser-
vice Request Enable Register. Figure 15-3 shows the structure of these registers.
Figure 15-3
Status byte and service request (SRQ)
Service
Request
Enable
Register
Status Summary Message
Read by Serial Poll
Read by *STB?
OSB = Operation Summary Bit
RQS = Request for Service
MSS = Master Summary Status
Mav = Message Available
ESB = Event Summary Bit
EAV = Error Available
QSB = Questionable Summary Bit
MSB = Measurement Summary Bit
& = Logical AND
OR = Logical OR
OR
&
&
&
&
&
&
*SRE
*SRE?
ESBOSB
(B5)(B6)(B7)
MAV
(B4)
QSB
(B3)
EAV
(B2) (B1) (B0)
____
MSB
*STB?
Serial Poll
Service
Request
Generation
ESB
(B5)
MAV
(B4)
QSB
(B3)
EAV
(B2) (B1)
MSB
(B0)
__
Status Byte
Register
OSB
(B6)
RQS
(B7)
MSS
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