HP E8402A, Руководство пользователя и обслуживания, Страница: 67 / 249

Programming the Enhanced Monitor 69
Chapter 3
HISTory:POWer[:HISTogram]?
<
supply
>[,MIN|MAX]
HISTory:POWer[:HISTogram]? <supply> returns the histogram data held for the
<supply>. Ten values are returned for the amount of time the <supply>’s power
spent in ten different power ranges. Those power ranges can be queried with the
MIN
and MAX optional parameter. The units of the time values returned are HOURs by
default, but can be changed with the HISTory:UNIT[:TIME] command.The units
returned for power ranges queried with the MIN or MAX parameters are integer
values in milliwatts.
Parameters
Returned Data
Comments
•
HIST:POW? P5 returns 10 time values for +5V supply.
•
HIST:POW? P5,MAX returns 10 values representing the maximum power for
each power range in milliwatts.
Error Conditions
The following table lists the most common error conditions and causes. Error
numbers and corresponding messages can be found using
SYSTem:ERRor? query.
Reset Condition
A *RST has no effect on the HISTory subsystem.
Related
Commands
HISTory:POWer:MAXimum?, HISTory:RESet:POWer, HISTory:UNITs[:TIME]
Name Type Range Default Description
< supply> enum. P5, P12, N12, P24,
N24, N5PT2, N2,
TOTal
none Selects the power supply whose power
histogram is desired. P5 is +5 Vdc
supply, N12 is -12 Vdc supply, etc.
optional
parameter enum. MIN, MAX none Returns the maximum or minimum of
the power range in milliwatts.
Type Range Default Description
<range1> int32 0-2147483647 none lowest power range.
<range2> int32 0-2147483647 none second power range.
<range3> int32 0-2147483647 none third power range.
<range4> int32 0-2147483647 none fourth power range.
<range5> int32 0-2147483647 none fifth power range.
<range6> int32 0-2147483647 none sixth power range.
<range7> int32 0-2147483647 none seventh power range.
<range8> int32 0-2147483647 none eighth power range.
<range9> int32 0-2147483647 none ninth power range.
<range10> int32 0-2147483647 none highest power range.
Number Message Probable Cause
-224 “Illegal Parameter” The <supply> or optional parameter not correct.
-109 “Missing Parameter” The <supply> parameter was omitted.
-311 “Memory error” The historical data’s memory is not available.
-221 “Settings Conflict” The power supply doesn’t support power
measurements.