SCPI Essential Order 
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Chapter3 SCPI Essential Order 
SYSTem:ERRor? 
This order is used to query the error information of the power supply. When the 
error LED lights on the front panel, it tells us that there is one or more hardware 
or order syntax error happened. There are at most 30 groups of error message. 
Send the order once will read one error message from the error queue. 
  Error messages follow the FIFO (first-in-first-out) principle. The first error 
will be returned first. When you read all the error tips information in the 
error queue. The ERROR led will turn off.    When error occur the buzzer of 
the power supply will beep once. 
  If more than 30 errors occurred, the last one stored in the queue will be 
replaced  by  “-350”,  Meaning  "too  many  mistakes".  If  the  error 
messages in the error message queue are not read out, the error 
following will not be saved to the queue. If there is no error message, 
when read error information, it will return “+0”, meaning “no error”. 
  If  turn  off  the  power  supply  or  send  “CLS (clear status) order, the  error 
messages in the error queue will be cleared. *RST order will not clear the 
error messages in the error queue. 
Order syntax 
SYSTem:ERRor? 
Parameter 
None 
Return parameter 
〈NR1〉,〈SRD〉 
SYSTem:VERSion? 
This order can query the version of the SCPI order. Returned value is a string 
like “YYYY.V”, in which the YYYY is the year of this version, V is the version. 
Order syntax 
SYSTem:VERSion? 
Parameter 
None 
Return parameter 
<NRf> 
SYSTem:REMote 
This order is used to set the power supply to remote control mode through the 
RS232 interface. Except for the Local key on the front panel, other keys are