BIT 4886 111315 A-5A.12 *SAV — SAVE COMMAND *SAVSyntax: *SAV (1 to 99)Description: Saves the present state of output voltage and output current to the specified memory location.This command stores the present state of the power supply to one of 99 memory locations in FlashMemory (see PAR. 3.6.3.7). The following parameters are stored by *SAV: FUNC:MODE,VOLT:MODE, CURR:MODE, VOLT:PROT, and CURR:PROT. Settings stored are:• Mode of operation (Voltage, Current or External) FUNC:MODE < >• Main channel reference type (internal or external) and setting (if internal)VOLT:MODE < > or CURR:MODE < >, VOLT < > or CURR < >• Protection channel reference type (internal or external) and setting (if internal)VOLT:PROT:MODE < > or CURR:PROT:MODE < >, VOLT:PROT < > or CURR:PROT < >• Output status (on or off) OUTP < >The stored values can be restored by the *RCL command. See PAR. 3.5.2.2 and Figure 3-16 for spe-cial programming considerations.A.13 *SRE — SERVICE REQUEST ENABLE COMMAND *SRESyntax: *SRE where = value from 0 - 255 per Table A-3, except bit 6 cannot be pro-grammed.Description: Sets the condition of the Service Request Enable register. The Service Request Enable registerdetermines which events of the Status Byte Register are summed into the MSS (Master Status Sum-mary) and RQS (Request for Service) bits. RQS is the service request bit that is cleared by a serialpoll, while MSS is not cleared when read. A “1” (1 = set = enable, 0 = reset = disable) in any ServiceRequest Enable register bit position enables the corresponding Status Byte bit to set the RQS andMSS bits. All the enabled Service Request Enable register bits then are logically ORed to cause Bit 6of the Status Byte Register (MSS/RQS) to be set. Related Commands: *SRE?, *STB?. (See exam-ple, Figure A-1.)A.14 *SRE? — SERVICE REQUEST ENABLE QUERY *SRE?Syntax: *SRE? Response: = value from 0 - 255 per Table A-3.Description: Reads the Service Enable Register. Used to determine which events of the Status Byte Register areprogrammed to cause the power supply to generate a service request (1 = set = function enabled, 0 =reset = function disabled). Related Commands: *SRE, *STB? (See example, Figure A-1.)A.15 *STB? — STATUS BYTE REGISTER QUERY *STB?Syntax: *STB? Response: value from 0 to 255 per Table A-3.Description: Reads Status Byte Register without clearing it. This Query reads the Status Byte Register (bit 6 =MSS) without clearing it (1 = set = function enabled, 0 = reset = function disabled). The register iscleared only when subsequent action clears all set bits. MSS is set when the power supply has oneore more reasons for requesting service. (A serial poll also reads the Status Byte Register, except thatbit 6 = RQS, not MSS; and RQS will be reset.) Related Commands: *SRE, *SRE?. (See example, Fig-ure A-1.)TABLE A-3. SERVICE REQUEST ENABLE AND STATUS BYTE REGISTER BITSCONDITION OPER MSSRQS ESB MAV QUES ERRQUELISTRUN BUSYBIT 7 6 5 4 3 2 1 0VALUE 128 64 32 16 8 4 2 1BUSY BusyLIST RUN List is runningOPER Operation Status SummaryMSS Master Status SummaryRQS Request for ServiceESB Event Status Byte summaryMAV Message availableQUES QUEStionable Status SummaryERR QUE 1 or more errors occurred (seePAR. B.133)
