KEPCO EL Series Electronic Load Operator Manual P/N 243-1295 Firmware Version 3.22 through 3.41 - Manual (Page 58)

A-2
SERIES EL 062011
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).
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). The error bits listed in Table A-2 are also related to error
codes produced during parsing of messages and to errors in the load (see PAR. B.83).
• Any 1xx type error sets the Command error bit (5).
• Any 2xx type error sets the Execution error bit (4).
• Any 3xx type error sets the Device error bit (3).
• Any 4xx type error sets the Query error bit (2).
A.6 *IDN? — IDENTIFICATION QUERY
*IDN?
Syntax: *IDN?
Return value: Character string
Description: Identifies the instrument. This query requests identification. The electronic load returns a string (see
example below) which contains the manufacturer name, the model, the serial number and the firm-
ware level. The character string contains the following fields: <Manufacturer>, <Model> <Warranty
Date>,<Serial Number>,MCB (Main Control Board) Serial number> <Firmware> $ <Date> where:
<Manufacturer> = KEPCO, <Model> =EL model (see Table 1-1), <Firmware = MCB Firmware revision
no.> and <Date> = Date and Time of MCB Firmware compilation.
KEPCO, EL 5K-600-200 03-15-2010,A104503,MCB #234 1.219 $ 2010/03/26 12:58:08 $
A.7 *OPC — OPERATION COMPLETE COMMAND
*OPC
Syntax: *OPC
Description: Causes load to set status bit 0 (Operation Complete) when pending operations are complete
This command sets Standard Event Status Register bit 0 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 com-
pleted. (1 = set = enable function, 0 = reset = disable function).
A.8 *OPC? — OPERATION COMPLETE QUERY
*OPC?
Syntax: *OPC?
Return value: <1> (ASCII) placed in output queue when load 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 Output Queue.