How Do You Access The Status Registers - Agilent Technologies ESA-E Series Programmer's Manual

Status Registers
Use Status Registers to Determine the State of Analyzer Events and Conditions
Status registers (except for the status byte register and the standard
event status register) consist of the registers whose contents can be
used to produce status summary bits.
These summary bits are then manipulated as follows: The condition
register passes summary bits to the negative and positive transition
filters, after which they are stored in the event register. The contents of
the event register are logically ANDed with the contents of the event
enable register and the result is logically ORed to produce a status
summary bit. The status summary bit is then passed to the status byte
register either directly, or through the STATus: QUEStionable register.
Next, the summary bits are logically ANDed with the contents of the
service request enable register and the result is logically ORed to
produce the request service (*RQS) bit in the status byte register.

How Do You Access the Status Registers?

There are two different methods to access the status registers:
• Common Commands Accesses and Controls
• Status Subsystem Commands
Common Command Access and Control
Most monitoring of the analyzer conditions is done at the highest level
using the following IEEE common commands:
*CLS (clear status) clears the status byte by emptying the error
queue and clearing all the event registers.
*ESE,*ESE? (event status enable) sets and queries the bits in the
enable register part of the standard event status register.
*ESR? (event status register) queries and clears the standard event
status register.
*OPC (operation complete) sets bit 0 in the standard event status
register when all operations are complete.
*SRE,*SRE? (service request enable) sets and queries the value of
the service request enable register.
*STB? (status byte) queries the value of the status byte register
without erasing its contents.
Complete command descriptions are given in
Reference" under the subsection entitled
on page 5-5.
2-6
Chapter 5, "Language
"IEEE Common Commands"
Chapter 2