Operator Manual User Manual

BIT 4886 120413 B-19
FIGURE B-6. USING STATUS COMMANDS AND QUERIES
B.71 STATus:QUEStionable[:EVENt]? QUERY STAT:QUES?
Syntax: Short Form: STAT:QUES[EVEN]? Long Form: STATus:QUEStionable[EVENT]?
Return Value: <int_value> actual register value
Description: Indicates the latched condition of the Questionable Event register. Returns the value of the
Questionable Event register (see Table B-5). The Questionable Event register is a read-only register
which holds (latches) all events. Only bits 13 and 12 are latched in the Status Questionable Event reg-
ister. Bits 0 and 1 of the Status Questionable Condition Register are not latched in the power supply.
Reading the Questionable Event register clears it. (See example, Figure B-6.)
NOTES: 1. The power supply is assumed to be operating in Voltage mode.
2 Examples below are intended only to illustrate command functions. Refer to PAR. 4.1.2 for
programming techniques to optimize performance.
STAT:PRES Operation Condition and Questionable Condition registers are
reset.
STAT:QUES:ENAB 12228 Allows latching of CE and VE bits.
STAT:OPER:ENAB 1280 Mask enabled for CC and CV bits.
STAT:OPER:ENAB? Returns 1280 (256 + 1024) (CC and CV bits set).
INIT:CONT ON Continuous triggers enabled.
STAT:OPER:COND? Power supply returns 256 to indicate that power
supply is in Voltage mode.
STAT:OPER? Returns 256, indicating that since the last reading of the
Operation Event Register the power supply has entered
Voltage mode.
STAT:OPER? Returns 0 indicating no changes since previous reading of the
Operation Event register.
STAT:QUES? Returns 0 (no questionable conditions occurred since previous
reading
--- OVERCURRENT CONDITION OCCURS
SYST:ERR? Power supply returns 0,“No error” message.
*RST;:VOLT 5;CURR 1;OUTP ON The BOP is in Voltage mode and delivering 5 Volts.
*ESR? Bop returns a 0 - all functions are normal.
FUNC:MODE CURR BOP is in Current mode but Limit Light is on.
*ESR?;STAT:QUES:COND? BOP returns 8;4097 - Current error.
*ESR?;STAT:QUES? BOP returns 0;4096 - no new errors, Current Error.
*ESR?;STAT:QUES? BOP returns 0;0 - no new errors.
MEAS:CURR?;VOLT? BOP returns 1.0E-4;5.00003E0 - Voltage is 5 volts.
STAT:QUES:COND? BOP returns 4097 - error still in effect.
Short is applied to the BOP.
*ESR?:STAT:QUES:COND? BOP returns 0;1 - Current mode is selected.
MEAS:VOLT?;CURR? BOP returns.1E-4;1.00003E0 - Current is 1 amperes.
FUNC:MODE VOLT;*ESR? BOP switches mode, returns 3 - settling.
*ESR?:;STAT:QUES? BOP returns 8;8194.
Short is removed from the BOP output.
STAT:QUES:COND? BOP returns 2, voltage mode operation OK.
TABLE B-5. QUESTIONABLE EVENT REGISTER, QUESTIONABLE CONDITION REGISTER
AND QUESTIONABLE CONDITION ENABLE REGISTER BITS
CONDITION NU CE VE NU CM VM
BIT 15-14 13 12 11 - 2 1 0
VALUE 32,768 -16,359 8192 4096 2048 - 4 2 1
CE CURRENT ERROR
VE VOLTAGE ERROR
CM CURRENT MODE
VM VOLTAGE MODE
NU NOT USED