*ESR?
Syntax
*ESR?
Description
This command queries the event register for the Standard Event Register group.
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For more information on the SCPI Status System for the Agilent 34980A, see Status System Introduction. |
Remarks
The following table lists the bit definitions for the Standard Event Register.
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Bit Number |
Decimal Value |
Definition |
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0 Operation Complete |
1 |
All commands prior to and including *OPC have been executed. |
|
1 Not Used |
Not Used |
"0" is returned. |
|
2 Query Error |
4 |
The instrument tried to read the output buffer but it was empty. Or, a new command line was received before a previous query has been read. Or, both the input and output buffers are full. |
|
3 Device Error |
8 |
A self-test or calibration error occurred (an error in the -300 range or any positive error has been generated). For a complete listing of the error messages, see SCPI Error Messages. |
|
4 Execution Error |
16 |
An execution error occurred (an error in the -200 range has been generated). |
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5 Command Error |
32 |
A command syntax error occurred (an error in the -100 range has been generated). |
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6 Not Used |
Not Used |
"0" is returned. |
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7 Power On |
128 |
Power has been turned off and on since the last time the event register was read or cleared. |
In order to be reported to the Standard Event Register, the corresponding bits in the event register must be enabled using the *ESE command.
Once a bit is set, it remains set until cleared by reading the event register or the *CLS (clear status) command.
Return Format
The command reads the event register and returns a decimal value which corresponds to the binary-weighted sum of all bits set in the register (see table above). For example, if bit 1 (decimal value = 2) and bit 4 (decimal value = 16) are set (and the corresponding bits are enabled), this command will return "+18".
Example
The following command reads the event register (bits 3 and 4 are set).
*ESR?
Typical Response: +24