Owner's manual

A-2 BIT 4882 030507
A.4 *ESE? — STANDARD EVENT STATUS ENABLE QUERY *ESE?
Syntax: *ESE? Return value: Integer> value per Table A-2.
Description: Returns the mask stored in the Standard Event Status Enable Register. Contents of Standard
Event Status Enable register (*ESE) determine which bits of Standard Event Status register (*ESR)
are enabled, allowing them to be summarized in the Status Byte register (*STB). All of the enabled
events of the Standard Event Status Enable Register are logically ORed to cause ESB (bit 5) of the
Status Byte Register to be set (1 = set = enable function, 0 = reset = disable function). (See example,
Figure A-1.)
A.5 *ESR? — EVENT STATUS REGISTER QUERY *ESR?
Syntax: *ESR?
Return value: <integer> (Value = contents of Event Status register as defined in Table A-2.)
Description: Causes the power supply to return the contents of the Standard Event Status register. After it
has been read, the register is cleared. The Standard Event Status register bit configuration is
defined in Table A-2 (1 = set, 0 = reset). Related Commands: *CLS, *ESE, *OPC. (See example, Fig-
ure A-1.)
A.6 *IDN? — IDENTIFICATION QUERY *IDN?
Syntax: *IDN?
Return value: Character string
Description: Identifies the instrument. This query requests identification. The power supply returns a string
which contains the manufacturer name, the model, the serial number and the firmware level. The
character string contains the following fields: <Manufacturer>, <Model>, <Serial Number>, <Firmware
revision> where: <Manufacturer> = KEPCO, <Model> = BOP BIT 488), <Serial Number> =
MM,DD,YY-SSS (MM - month, DD - day, YY - year, SSS - serial number in that day) <Firmware revi-
sion>=n.m (n.m revision, e.g, 1.0) (See example, Figure A-1.)
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
previous commands have been executed and changes in output level have been completed. This
command 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, Figure A-1.) As an example, the controller sends command(s), then sends *OPC. If control-
ler then sends *ESR?, the power supply responds with either a “0” (if the power supply is busy execut-
ing the programmed commands), or a “1” (if the previously programmed commands are complete).
(See example, Figure A-1.)
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.)
A.9 *RST — RESET COMMAND *RST
Syntax: *RST
Description: Resets power supply to the power on default state. The power supply is programmed to the power
on values of the following parameters: CURR[:LEV][:IMM] = 0, VOLT[:LEV][:IMM] = 0,
CURR:PROT[:LEV] = max overcurrent value, VOLT:PROT[:LEV] = (maximum overvoltage value,