Status Byte And Service Request (Srq) - Keithley 6430 Instruction Manual

Table 14-2
Data format commands for reading status registers
Command
:FORMat:SREGister <name>

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 14-3 shows the structure of these registers.
Figure 14-3
Status byte and
service request
(SRQ)
Service
Request
Generation
Description
Select data format for reading status registers:
<name> = ASCii
HEXadecimal
OCTal
BINary
Status Summary Message
RQS
*STB? OSB ESB
(B6)
Serial Poll (B77) (B5)
MSS
&
&
OR
__
*SRE OSB ESB
*SRE? (B7) (B6) (B5)
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
Status Structure
Decimal format
Hexadecimal format
Octal format
Binary format
__
MAV QSB EAV MSB
(B4) (B3) (B2) (B1) (B0)
&
&
&
&
__
MAV QSB EAV MSB
(B4) (B3) (B2) (B1) (B0)
14-7
Default
ASCii
Read by Serial Poll
Status Byte
Register
Read by *STB?
Service
Request
Enable
Register