Experimental Physics and Industrial Control System
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Hi Himanshu,
Yes, the compress records are saving arrays of data and time values
so you can display data vs time in xygraph.
The TimeStamp stringin PV is used to convert the internal timestamp
of the sin PV, read via "TST:IOC:SinValue1.TIME", into a floating
point
string that can be read as input by the calc record or other
records.
In Ralph's version, he uses the stringin record directly as input to
the
compress record to get absolute timestamps. My version used a calc
record to get relative timestamps. Either approach can be used
depending on whether you want absolute or relative timestamps.
You can also vary the NSAM values to get arrays larger than 20
values,
or change the scan rate for the sin PV or use some other PV for your
data and timestamp source.
Hope this helps!
Regards,
- Bruce
On 05/23/2013 09:48 PM, Himanshu Tyagi
wrote:
Hi Ralph/Bruce,
Thanks a lot for your suggestions. I wanted to ask
you whether can we us any other record instead of Stringin
?
As far as I understand we are using compress
records for saving 20 sample data of the sine wave. and
similarly we are obtaining the timestamps for the sine PV and
storing the successive time events in another compress record.
Can you confirm that my understanding is
correct.Also can you please throw some light on the record of TST:IOC:SinValue1:TimeStamp ,
like what exactly is this PV working/
Thanks and
regards,
Himanshu Tyagi
--
Bruce Hill
Member Technical Staff
SLAC National Accelerator Lab
2575 Sand Hill Road M/S 10
Menlo Park, CA 94025
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- References:
- Relative time in XY graph Himanshu Tyagi
- Re: Relative time in XY graph Himanshu Tyagi
- Re: Relative time in XY graph Bruce Hill
- Re: Relative time in XY graph Ralph Lange
- Re: Relative time in XY graph Bruce Hill
- Re: Relative time in XY graph Ralph Lange
- Re: Relative time in XY graph Himanshu Tyagi
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