Syntax and Commands
16 PS2520G and PS2521G Programmer Manual
Table 3: Status Commands (Cont.)
Command Description
%#$! "%'
 $"& 
Sets the contents of the enable mask for the
QUEStionable INSTrument ISUMmary
event register (ISUMmary1, ISUMmary2, or
ISUMmary3).
%#$! "%'
 $"& 
Returns the contents of the enable mask for
the QUEStionable INSTrument ISUMmary
event register (ISUMmary1, ISUMmary2, or
ISUMmary3). Returns NR1.
%#$! "%'
 $"& $
Returns and clears the contents of the
QUEStionable INSTrument ISUMmary
event register (ISUMmary1, ISUMmary2, or
ISUMmary3).
 Sets contents of Service Request Enable
Register (SRER).
 Returns contents of Service Request Enable
Register (SRER).
 Reads Status Byte Register (SBR).
Miscellaneous Commands
Table 4 lists the miscellaneous commands that control general
housekeeping functions of the programmable power supplies.
Table 4: Miscellaneous Commands
Command Description
 Returns instrument identification.
 Reports when operation is complete by
setting the Operation Complete bit in SESR.
 Reports when operation is complete. Same
as  except returns a 1 to the output
queue and does not set the SESR bit.