Agilent Technologies InfiniiVision 4000 X-Series Programmer's Manual page 168

5
Common (*) Commands
*ESR (Standard Event Status Register)
Query Syntax
*ESR?
The *ESR? query returns the contents of the Standard Event Status
Register. When you read the Event Status Register, the value returned is
the total bit weights of all of the bits that are high at the time you read
the byte. Reading the register clears the Event Status Register.
The following table shows bit weight, name, and condition for each bit.
OR
To ESB bit in
Statu s Byte
Table 68 Standard Event Status Register (ESR)
Bit
7
6
5
4
3
2
1
0
Return Format
<status><NL>
<status> ::= 0,..,255; an integer in NR1 format.
168
(see page 1208)
128 64 32 16 8 4
PON URQ CME EXE DDE QYE
7 6 5 4 3 2
Register
Name Description
PON Power On
URQ User Request
CME Command Error
EXE Execution Error
DDE Device Dependent Error
QYE Query Error
RQL Request Control
OPC Operation Complete
Agilent InfiniiVision 4000 X-Series Oscilloscopes Programmer's Guide
2 1
Standard Event
RQL OPC *ESR?
Status Register
1 0
Standard Event
*ESE
Status Enable
*ESE?
(Mask) Register
When Set (1 = High = True), Indicates:
An OFF to ON transition has occurred.
A front-panel key has been pressed.
A command error has been detected.
An execution error has been detected.
A device-dependent error has been detected.
A query error has been detected.
The device is requesting control. (Not used.)
Operation is complete.