Operator Manual User Manual

BIT 4886 120413 A-3
A.7 *OPC — OPERATION COMPLETE COMMAND
*OPC
Syntax: *OPC
Description: Causes power supply to set status bit 0 (Operation Complete) when pending operations are
complete This command sets Standard Event Status Register bit 0 (see Table A-2) to “1” when all pre-
vious commands have been executed and changes in output level have been completed. This com-
mand does not prevent processing of subsequent commands, but bit 0 will not be set until all pending
operations are completed. (1 = set = enable function, 0 = reset = disable function). (See example, Fig-
ure A-1.) As an example, the controller sends command(s), then sends *OPC. If controller then sends
*ESR?, the power supply responds with either a “0” (if the power supply is busy executing the pro-
grammed commands), or a “1” (if the previously programmed commands are complete). (See exam-
ple, 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, BIT 4886 100-2 123456 1.8-1.8
*OPC Allows status bit 0 to be set when pending operations complete
VOLT 21;CURR 3 Sets output voltage to 21V, output current 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;*ESR? Sets output voltage to 15V, output current 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.
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.