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NOTE
*STB? returns the Status Byte Register
OSB
7
Status
0
Byte
All bits shown as
Figure 1-2
Introduction to Programming
Common Commands
These commands are described in more detail in "IEEE-Common
Commands" on page 47.
Common Status Information
There are three registers for the status information. Two of these are
status-registers and one is an enable-registers. These registers
conform to the IEEE Standard 488.2-1987. You can find further
descriptions of these registers under *ESE, *ESR?, and *STB?.
Figure 1-2 shows how the Standard Event Status Enable Mask
(SESEM) and the Standard Event Status Register (SESR)
determine the Event Status Bit (ESB) of the Status Byte.
ESB
QSB
6
5
4
3
2
1
1
0
are unused
The Event Status Bit
26
*ESE sets the Standard Event Status Enable Mask
Event
7
6
Status
1
Enable
Mask
&
0
&
7
6
Event
Status
0
Register
*ESR? returns the Standard Event Status Register
5
4
3
2
1
1
1
1
1
1
&
&
&
&
&
&
5
4
3
2
1
0
0
0
0
0
1
0
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