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–
When you find it, check which bits
in the Status Byte Register are true.
–
Let’s say that bit 7, OPR, is true.
Then read the contents of the Opera
-
tion Status Register. In this register
you can see what caused the SRQ.
–
Take appropriate actions depending
on the reason for the SRQ.
Standard Status Registers
These registers are called the standard
status data structure because they are
mandatory in all instruments that fulfill
the IEEE 488.2 standard.
6-20 Status Subsystem
Using the Subsystems
O u tp u t Q u e u e n o t e m p ty
<...read by *STB?
Service Request Enable
Logical O R
Status Byte
Register
SRQ
signal
1
6
RQS
MSS
ESB MAV
Service
Request
Generation
Standard Event Status Enable
Logical O R
1
6754320
Output
Queue
132 0
7
*ESE <NRf>
*ESE?
*SRE <NRf>
*SRE?
Standard Event
Status Register
*ESR?
PONURQCME
EXE
DDEQYE
RQC OPC
Figure 6-8 Standard status data structures, overview.