General Remarks - Agilent Technologies HP E5574A User Manual

Operation Complete
Request Control
Query Error
Device Dependant Error
Command Error
User Request
Power On
Figure 8-1
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HP-IB Programming
IEEE Common Commands

General Remarks

Common Status Information
There are four registers for status information:
• Status Byte register (STB)
• Service Request Enable register (SRE)
• Event Status Register (ESR)
• Event Status Enable register (ESE)
Two of these are status-registers and two are enable-registers.
These registers conform to the IEEE Standard 488.2-1987. You can
find further descriptions of these registers under *ESE, *ESR?,
*SRE, and *STB?. The following figure shows how the registers
are organized.
Operation Complete Operation Complete 0 &
Request Control Request Control 1 &
Query Error Query Error 2
Device Dependant Error Device Dependant Error 3
Execution Error Execution Error 4
Command Error Command Error 5
User Request User Request 6
Power On Power On 7
Event Status
Register
Common Status Registers
* The questionable and operation status commands are described in
section 8.4 "Standard STATUS Commands" on page 118.
108
Questionable Status *
Message
Questionable Status * Questionable Status *
Message Available Message Available
Request Service
Operation Status *
Request Service Request Service
+
Operation Status * Operation Status *
Status Byte
0
1
& 2
& 3
& 4
& 5
& 6
& 7
Event Status
Enable Register
+
0 & 0
1 & 1
2 & 2
3 & 3
4 & 4
5 & 5
6 6
7 & 7
Service Request
Enable Register