Technical data

28 Programmer’s Guide
3 Status Registers
Standard Event Status Register
The standard event status register is used to determine the specific event
that sets bit 5 in the status byte register. The standard event status
register does not have negative and positive transition registers, nor a
condition register. Use the IEEE common commands at the beginning of
“Command Reference” on page 49 to access the register.
To query the standard event status register, send the *ESR command.
The response will be the decimal sum of the bits which are set to 1. For
example, if bit number 7 and bit number 3 are set to 1, the decimal sum
of the 2 bits is 128 plus 8. So the decimal value 136 is returned.
See “Setting and Querying the Status Register” on page 25 for more
information.
Figure 2 Standard Event Status Register Diagram
Operation Complete
Request Bus Control
Query Error
Device Dependent Error
Execution Error
Command Error
User Request
Power On
&
&
&
&
&
&
&
+
0 1 2 3 4 5 6 7
Event Enable Register
&
0
1 2
3 4 5 6 7
To Status Byte Register bit #5
Standard Event
Status Register