History:unit[:Time] <Unit> History:unit[:Time] - HP E8402A User And Service Manual

HISTory:UNIT[:TIME] < unit >
HISTory:UNIT[:TIME]?
Parameters
Returned Data
Comments
Error Conditions
Reset Condition
Related
Commands
84 Programming the Enhanced Monitor
<unit> sets the time units that will be used to report historical
HISTory:UNIT[:TIME]
data with histograms and history events.
HISTory:UNIT[:TIME]? returns a string (enumerated) of the time units that are used
to report historical data with histograms and history events. The strings returned are:
HOUR, MIN, SEC.
Name Type Range
< unit >
enum. HOUR,
MINute,
SECond
Type Range
enum. HOUR, MIN, SEC
•
Use of this command does not change the amount and resolution of the data
kept by the enhanced monitor's HISTory subsystem. It simply changes the
reporting of that data. When set to hours it reports the data to the nearest hour,
and so on.
•
The setting is stored in non-volatile memory with the
command.
The following table lists the most common error conditions and causes. Error
numbers and corresponding messages can be found using
Number Message
-109 "Missing parameter"
-224 "Illegal Parameter"
*RST sets units back to the last value saved with the SYSTem:NVSave command.
SYSTem:NVSave, SYSTem:NVRecall, HISTory:QUEue[:FETCh]?,
HISTory:TEMPerature[:HISTogram]?, HISTory:CURRent[:HISTogram]?
Default
HOUR Selects the time unit used within the
HISTory subsystem.
Description
Time units for reporting historical data.
The <unit> parameter was omitted.
The <unit> parameter was not correct.
Description
SYSTem:NVSave
query.
SYSTem:ERRor?
Probable Cause
Chapter 3