Status Model - Keithley 2450 Reference Manual

In this appendix:
Overview
The status model consists of status register sets and queues. You can monitor the status model to
view instrument events; you can also configure the status model to control the events.
As you work with the status model, keep in mind the end result applies to the Status Byte Register. All
the status register sets and queues flow into the Status Byte Register. Your test program can read
this register to determine if a service request (SRQ) has occurred, and if so, which event caused it.
The Status Byte Register register sets and queues include:
•
Standard Event Register
•
Questionable Event Register
•
Operation Event Register
•
Output Queue
•
Error Queue
The relationship between the Status Byte Register, Standard Event Register, event queue, and the
output queue is shown in the
relationship between the Status Byte Register, Questionable Event Register, and the Operation Event
Register is shown in the
Overview ................................................................................. C-1
Serial polling and SRQ .......................................................... C-13
Programming enable registers .............................................. C-13
Reading the registers ............................................................ C-14
Understanding bit settings ..................................................... C-15
Clearing registers .................................................................. C-16
Status model programming examples ................................... C-17
Non-programmable status registers diagram
Programmable status registers diagram
Appendix C

Status model

(on page C-2). The
(on page C-6).