KEPCO BHK-MG 200W (Full Rack) Series - Manual (Page 130)

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BHK-MG (OPR) 022014
A.12 *SRE — SERVICE REQUEST ENABLE COMMAND
*SRE
Syntax: *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 regis-
ter determines which events of the Status Byte Register are summed into the MSS (Master
Status Summary) and RQS (Request for Service) bits. RQS is the service request bit that is
cleared by a serial poll, while MSS is not cleared when read. A “1” (1 = set = enable, 0 =
reset = disable) in any Service Request Enable register bit position enables the correspond-
ing Status Byte bit to set the RQS and MSS bits. All the enabled Service Request Enable
register bits then are logically ORed to cause Bit 6 of the Status Byte Register (MSS/RQS)
to be set. Related Commands: *SRE?, *STB?. (See example, Figure A-1.)
A.13 *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 are
programmed 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.14 *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 is
cleared only when subsequent action clears all set bits. MSS is set when the power supply has one or
more reasons for requesting service. (A serial poll also reads the Status Byte Register, except that bit
6 = RQS, not MSS; and RQS will be reset.) Related Commands: *SRE, *SRE?. (See example, Figure
A-1.)
A.15 *TRG — TRIGGER COMMAND
*TRG
Syntax: *TRG
Description: Triggers the power supply to be commanded to preprogrammed values of output current and
voltage. When the trigger is armed (checked by examining WTG bit in Status Operational Condition
register) *TRG generates a trigger signal. The trigger will change the output of the power supply to the
output voltage and current levels specified by VOLT:TRIG and CURR:TRIG commands.
*TRG is an
addressed command (only devices selected as listeners will execute the command). Related
Commands: ABOR, INIT, TRIG, CURR:TRIG, VOLT:TRIG. (See example, Figure A-1. )
A.16 *TST? — SELF TEST QUERY
*TST?
Syntax: *TST? Returned value: 0 or 1 (0 = pass test, 1 = fail test)
Description: Power Supply test.This query causes the power supply to do a self test and provide the controller
with pass/fail results. A cyclic redundancy check (CRC) is performed on non-volatile RAM. A “1” is
returned if there is an error.
TABLE A-3. SERVICE REQUEST ENABLE AND STATUS BYTE REGISTER BITS
CONDITION OPER
MSS
RQS
ESB MAV QUES
ERR
QUE
NU NU
BIT 7 6 5 4 3 2 1 0
VALUE 128 64 32 16 8 4 2 1
OPER Operation Status Summary
MSS Master Status Summary
RQS Request for Service
ESB Event Status Byte summary
MAV Message available
QUES QUEStionable Status Summary
ERR QUE 1 or more errors occurred (see
PAR. B.81)
NU (Not Used)