Agilent Technologies E3634A Status Reporting Commands, SYSTemERRor?, STATusQUEStionableCONDition?

Chapter 4 Remote Interface Reference

Status Reporting Commands

Status Reporting Commands

See diagram ‘‘SCPI Status System’’, on page 103 in this chapter for detailed information of the status register structure of the power supply.

SYSTem:ERRor?

This query command reads one error from the error queue. When the front- panel ERROR annunciator turns on, one or more command syntax or hardware errors have been detected. A record of up to 20 errors can be stored in the power supply’s error queue. See ‘‘Error Messages’’ for a complete listing of the errors in chapter 5.

•The first error returned is the first error that was stored. When you have read all errors from the queue, the ERROR annunciator turns off. The power supply beeps once each time an error is generated.

•If more than 20 errors have occurred, the last error stored in the queue (the most recent error) is replaced with -350, ‘‘Too many errors’’. No additional errors are stored until you remove errors from the queue. If no errors have occurred when you read the error queue, the power supply responds with +0, ‘‘No error’’.

•The error queue is cleared when power has been off or after a *CLS (clear status) command has been executed. The *RST (reset) command does not clear the error queue.

•All errors are cleared when you exit the menu or let the display time out for about 30 seconds.

STATus:QUEStionable:CONDition?

This command queries the Questionable Status condition register to check CV or CC mode of the power supply. The power supply returns a decimal value which corresponds to the binary-weighted sum of all bits in the register. These bits are not latched. If ‘‘0’’ is returned, the power supply is in output off or unregulated state. If ‘‘1’’ is returned, the power supply is in the CC operating mode and if ‘‘2’’ is returned, the power supply is in the CV operating mode. If ‘‘3’’ is returned, the power supply is in failure.

STATus:QUEStionable?

This command queries the Questionable Status event register. The power supply returns a decimal value which corresponds to the binary-weighted sum of all bits in the register. These bits are latched. Reading the event register clears it.

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