BIT 4886 051010
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. 4.1.1 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
