GW Instek PPH-1503 - Manual (Page 121)

REMOTE CONTROL
121
SCPI Status Registers SCPI
The SCPI instrument configuration is controlled by the status registers.
The Status system records various instrument conditions into three main
register groups: The status byte register, the standard event register
group and the questionable data register group. The status byte register
records a high-level summary of the other register groups. The following
diagram is the SCPI Status System diagram.