BIT 4886 111315 A-1APPENDIX A - SCPI COMMON COMMAND/QUERY DEFINITIONSA.1 INTRODUCTIONThis appendix defines the SCPI common commands and queries used with the BOP power supply.Common commands and queries are preceded by an asterisk (*) and are defined and explained inparagraphs A.2 through A.18, arranged in alphabetical order. Table A-1 provides a quick referenceof all SCPI common commands and queries used in the Interface Card.A.2 *CLS — CLEAR STATUS COMMAND *CLSSyntax: *CLSDescription: Clears status data. Clears the error queue of the instrument. Forces power supply to “operation com-plete idle” state. Clears all Event Registers summarized in Status Byte Register without affecting thecorresponding Enable Registers: Standard Event Status Register (ESR), Operation Status Event Reg-ister, Questionable Status Event Register, and Status Byte Register (STB). Related commands: *OPC,*OPC?. (See example, Figure A-1.)A.3 *ESE — STANDARD EVENT STATUS ENABLE COMMAND *ESESyntax: *ESE where = positive whole number: 0 to 255 per Table A-2.Default Value: 0Description: This command programs the standard Event Status Enable register bits. The contents functionas a mask to determine which events of the Event Status Register (ESR) are allowed to set the ESB(Event Summary Bit) of the Status Byte Register. Enables the Standard events to be summarized inthe Status Byte register (1 = set = enable function, 0 = reset = disable function). All of the enabledevents of the standard Event Status Enable register are logically ORed to cause ESB (bit 5) of the Sta-tus Byte Register to be set (1 = set = enable, 0 = reset = disable). (See example, Figure A-1.)TABLE A-1. IEEE 488.2 COMMAND/QUERY INDEXCOMMAND PAR. COMMAND PAR.*CLS A.2 *RST A.11*ESE, ? A.3, A.4 *SAV A.12*ESR? A.5 *SRE, ? A.13, A.14*IDN? A.6 *STB? A.15*OPC, ? A.7, A.8 *TRG A.16*OPT? A.9 *TST? A.17*RCL A.10 *WAI A.18TABLE A-2. STANDARD EVENT STATUS ENABLE REGISTER AND STANDARDEVENT STATUS REGISTER BITSCONDITION NU NU CME EXE DDE QUE NU OPCBIT 7 6 5 4 3 2 1 0VALUE 128 64 32 16 8 4 2 1NU (Not Used)CME Command ErrorEXE Execution ErrorDDE Device Dependent ErrorQUE Query ErrorOPC Operation Complete
