5 Programming Examples
264 Keysight Models 6811C, 6812C, and 6813C Programming Guide
Standard event status group
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 (refer to Figure 5-5). 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.
The PON (power on) bit
The PON bit in the Standard Event register is set whenever the ac source is turned
on. The most common use for PON is to generate an SRQ at power-on following
an unexpected loss of power. To do this, bit 7 of the Standard Event Enable
register must be set so that a power-on event registers in the ESB (Standard Event
Summary Bit). Bit 5 of the Service Request Enable register must be set to permit
an SRQ to be generated, and *PSC OFF must be sent. The commands to
accomplish these conditions are as follows:
*PSC OFF
*ESE 128
*SRE 32
Command Action
*ESE programs specific bits in the Standard Event Enable register.
*PSC ON clears the Standard Event Enable register at power-on.
*ESR? reads and clears the Standard Event register.
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