Tegam 2711A, Operation Manual

Page: 77 / 98

8 - 9
8
Status and Event Registers
There are four required status or event registers. They are:
1)
Standard Event Status Enable (ESE) Register
2) Standard Event Status (ESR) Register
3) Service Request Enable (SRE) Register
4) Status Byte (STB) .
The following diagram shows how the registers are related to each other.
These registers indicate device status, and allow the programmer to specify
which device events will enable a service request.
Operation Complete
Not Used
Query Error
Device Error
Execution Error
Command Error
Not Used
Power On
0
1
2
3
4
5
6
7
Event Register Enable Register
+
Device Dependent
Not Used
Not Used
Not Used
Message Available
Standard Event
Request Service
Not Used
0
1
2
3
4
5
6
7
Summary Register Enable Register
+
Output Buffer
Standard Event
Status Byte
2
0
= 1
2
1
= 2
2
2
= 4
2
3
= 8
2
4
= 16
2
5
= 32
2
6
= 64
2
7
=128
Binary Weights
*ESR?
*ESE <value>
*ESE?
Serial Poll (SPOLL)
*STB?
*SRE <value>
*SRE?
OR
OR
Chapter 8 Advanced Programming
GPIB (IEEE-488.2) Overview - Status and Event Registers
0
1
Event Register Enable Register
2
+
Instrument Status
OR
End Pulse (ENDP)
End Block (ENDB)
1
2 . Enable Register is
active only for GPIB .
Diagram - Status and Event Registers
1 . End Block (ENDB) is
active only for Sequence .