KEPCO BOP 1KW-MG Operator Manual, Firmware Ver.2.01 to 2.37 - Manual (Page 143)

BIT 4886 022108
A-3
A.8 *OPC? — OPERATION COMPLETE QUERY
*OPC?
Syntax: *OPC?
Return value: <1> (ASCII) placed in output queue when power supply has completed operation.
Description: Indicates when pending operations have been completed.When all pending operations are com-
plete (all previous commands have been executed and changes in output level have been completed)
a “1” is placed in the Output Queue. Subsequent commands are inhibited until the pending operations
are completed. *OPC? is intended to be used at the end of a command line so that the application pro-
gram can monitor the bus for data until it receives the “1” from the power supply Output Queue. (See
example, Figure A-1.)
FIGURE A-1. GPIB COMMANDS
*CLS Power supply clears status data.
*ESE 60 Power supply enables bits 5, 4, 3 and 2, allowing command error, execution
error, device dependent error and query error to set the Event Status
Summary bit when an STB command is executed.
*ESE? Returns 60, (value of the mask) verifying that bits 5, 4, 3 and 2 are enabled.
*ES Unknown command will set command error (Bit 5).
*ESR? Returns 32 (bit 5 set), indicating Command Error has occurred since the last
time the register was read.
*IDN? Power supply returns: KEPCO, BOP_1000W 36-28 123456 1.43.
*OPC Allows status bit 0 to be set when pending operations complete
VOLT 21;CURR 3 If unit is in voltage mode, sets output voltage to 21V, output current protection
limit to 3A.
*ESR Returns 129 (128 + 1, power on, bit 7 = 1, operation complete, bit 1 = 1).
*ESR Returns 0 (event status register cleared by prior *ESR?).
VOLT 15;CURR 5;*OPC? Sets output voltage to 15V, output current protection limit to 5A, puts “1” on
output bus when command operations are complete.
*RST Power supply reset to power on default state.
*SRE 40 When ESB or QUES bits are set (Table A-3), the Request for Service bit will
be set.
*SRE? Returns the value of the mask (40).
*STB? For example, the Power supply responds with 96 (64 + 32) if MSS and the
Event Status Byte (Table A-3) summary bit have been set. The power
supply returns 00 if no bits have been set.
OUTP ON Programmed voltage will be applied to output terminals.
VOLT 25 Power supply voltage commanded to 25V.
VOLT:TRIG 12 Programs power supply voltage to 12V when *TRG received.
INIT Trigger event is initialized.
*TRG Power supply reverts to commanded output voltage of 12V.
** LOAD DISCONNECTED
*TST? Power supply executes self test and responds with 0 if test completed
successfully, with 1 if test failed.