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INSTRUMENTS
9.6 Standard Event Status Group
9.6.1 Register Functions
This group consists of an Event register and an Enable register that are programmed by COMMON
commands. The Standard Event register latches events relating to interface communication status.
It is a read-only register that is cleared when read. The Standard Event Enable register functions
similarly to the Enable registers of the Operation and Questionable status groups.
9.6.2 Register Commands
The common *ESE command programs specific bits in the Standard Event Status Enable register.
Because the power supply implements *PSC, the register is cleared at power on if *PSC = 1.
*ESR? reads the Standard Event Status Event register. Reading the register clears it.
Bit Signal Meaning
0 OPC Operation complete
2 QYE Query error
3 DDE Device-dependent error
4 EXE Execution
6 CME Command error
7 PON Power on
Table 9-3: Standard Event Status Group
Operation Complete
Set whenever the last command is completed and the software is ready to accept another command,
or when query results are available.
Query Error
Set when a query is made for which no response is available.
Device Dependent Error
Set for device specific errors. These errors are entered in the System Error Queue and have error
codes greater than 0. See Table 9-6 for error descriptions.
Execution Error
Set when a parameter exceeds its allowed range.
Command Error
Set for a syntax error.
Power On
Set once at power-up. The Status Byte ESR bit is not set.