KEPCO MST 488 Programmer - Manual (Page 56)

B-8
MST 488-27 013004
B.28
STATus:QUEStionable[:EVENt]?
QUERY
STAT:QUES?
Syntax: Short Form: STAT:QUES[EVEN]? Long Form: STATus:QUEStionable[EVENT]?
Return Value: actual register value
Description: Indicates questionable events that occurred since previous STAT:QUES? query. Returns the
value of the Questionable Event register (see Table B-3). The Questionable Event register is a
read-only register which holds (latches) all events. Reading the Questionable Event register clears it.
(See example, Figure B-5.)
FIGURE B-5. USING STATUS COMMANDS AND QUERIES
TABLE B-3. QUESTIONABLE EVENT REGISTER, QUESTIONABLE CONDITION REGISTER
AND QUESTIONABLE CONDITION ENABLE REGISTER BITS
CONDITION PL OL RE NU NU NU NU NU OT NU CE VE
BIT 11 10 9 8 7 6 5 4 3 2 1 0
VALUE 2048 1024 512 256 128 64 32 16 8 4 2 1
PL POWER LOSS
OL OVERLOAD
RE RELAY ERROR
OT OVERTEMPERATURE
CE CURRENT ERROR
VE VOLTAGE ERROR
NU NOT USED
NOTE: The selected MST power supply is assumed to be operating in cV (constant voltage) mode.
STAT:OPER:ENAB 1056 Mask enabled for CC, WTG and bits.
STAT:OPER:ENAB?
Returns 1056 (32 + 1024) (CC, WTG bits set).
STAT:QUES:ENAB 3 Mask enabled for OV and OC bits (1 + 2).
STAT:QUES:ENAB? Returns 3 (1 + 2) indicating OV and OC bits are enabled.
STAT:PRES Operation Condition and Questionable Condition registers are
reset.
INIT:CONT ON Continuous triggers enabled.
STAT:OPER:COND? Power supply returns 288 (256 + 32) to indicate that power
supply is constant voltage mode and Wait For Trigger is true.
STAT:OPER? Returns 1057, e.g., indicating that since the last reading of the
Operation Event Register the power supply has entered
Constant Current mode, the Wait Trigger was set.
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
STAT:QUES? Returns 2 (overcurrent protection tripped since the last
STAT:QUES? query).
STAT:QUES:COND? Returns 2, (Power supply still in overcurrent protection state).
STAT:QUES? Returns 0, (Register cleared by previous STAT:QUES?).
STAT:QUES:COND? Returns 2, (Power supply still in overcurrent protection state).
SYST:ERR? Power supply returns 0,“No error” message.
inst:sel 1 Select instrument 1
stat:ques? MST 488 responds 4 indicating instrument 1 in current mode
inst:sel 2 Select instrument 2
stat:ques? MST 488 responds 8 indicating instrument 2 in voltage mode
stat:ques:inst:isum1? MST 488 responds 4 indicating instrument 1 in current mode
stat:ques:inst:isum2? MST 488 responds 8 indicating instrument 2 in voltage mode