12-2 Common Commands
Common commands (summarized in Table 12-1) are device commands that are common to 
all devices on the bus. These commands are designated and defined by the IEEE-488.2 standard. 
Table 12-1
IEEE-488.2 common commands and queries
Mnemonic Name Description
*CLS Clear status Clears all event registers and Error Queue.
*ESE  <NRf> Event enable command Program the Standard Event Enable Register. 
*ESE? Event enable query Read the Standard Event Enable Register.
*ESR? Event status register query Read the Standard Event Enable Register and clear it. 
*IDN? Identification query Returns the manufacturer, model number, serial number, 
and firmware revision levels of the unit. 
*OPC Operation complete command Set the Operation Complete bit in the Standard Event 
Status Register after all pending commands have been 
executed.
*OPC? Operation complete query Places an ASCII “1” into the output queue when all pend-
ing selected device operations have been completed. 
*RCL  <NRf> Recall command Returns the 2182 to the user-saved setup. 
*RST Reset command Returns the 2182 to the *RST default conditions.
*SAV  <NRf> Save command Saves the present setup as the user-saved setup.
*SRE  <NRf> Service request enable command Programs the Service Request Enable Register. 
*SRE? Service request enable query Reads the Service Request Enable Register.
*STB? Status byte query Reads the Status Byte Register. 
*TRG Trigger command Sends a bus trigger to the 2182. 
*TST? Self-test query Performs a checksum test on ROM and returns the result. 
*WAI Wait-to-continue command Wait until all previous commands are executed.