Re: Record for a running sum

[Donny Domagoj Cosic via Tech-talk <tech-talk@aps.anl.gov>]

Hi Yong,

Thank you very much for the detailed response. I follow your logic and 
it seems like a good solution. All the solution that I came up with were 
a lot more complicated so I really enjoy the simplicity of this 
solution. The only thing that I had to add to your solution is a new 
record that saves the "Dosage:1h" values before every reset. However 
with my limited knowledge of EPICS (I just started working with EPICS a 
month ago) I dont think i did it properly. I created a new calc record 
that looks for the reset and forwards the old Dosage:1h value. Im sure 
there is a better way to do this maybe using the OOPT field, however I 
was not able to get it to work properly. Am I thinking about this in the 
right way?

Regards,
Donny

---
Donny Domagoj Cosic
 Institut Ruđer Bošković, Bijenička cesta 54, 10000 Zagreb, Croatia

Dana 05.12.2019 22:14, Hu, Yong je napisao(la):
> Hi Donny,
>
> I did similar applications at NSLS-II: calculate hourly, daily,
> monthly, yearly cumulative beam current in the Storage Ring.
>
> Here is one example to test the cumulative dosage in one minute:
> "DosagePV" is a simulated PV; "Dosage:1h" is the cumulative dosage;
> Whenever one minute passes, the value of “TimeStamp” (@%M) will
> change and "Dosage:1h-Reset_" will set "Dosage:1h" to 0.
>
> To calculate hourly, daily, monthly, yearly dosage, simply change %M
> in field(INP, "@%M") to %H, %d, %b, %Y.
>
> To preserve the cumulative dosage, you should use EPICS AutoSave
> (info(autosaveFields_pass0, "VAL")). Otherwise, the value will be 0
> after your IOC is rebooted.
>
> record(calc, "DosagePV") {
>
>  field(INPA, "DosagePV")
>
>  field(SCAN, "1 second")
>
>  field(CALC, "A+1")
>
>  field(FLNK, "TimeStamp")
>
> }
>
> record(stringin, "TimeStamp")
>
> {
>
>  field(DTYP, "Soft Timestamp")
>
>  field(PINI,"YES")
>
>  #field(INP, "@%b %d, %Y %H:%M:%S.%03f")
>
>  field(INP, "@%M")
>
> }
>
> record(calcout, "Dosage:1h-Reset_")
>
> {
>
>  field(INPA, "TimeStamp CP")
>
>  field(CALC, "0")
>
>  field(OUT, "Dosage:1h PP")
>
> }
>
> record(calcout, "Dosage:1h-Calc_")
>
> {
>
>  field(INPA, "Dosage:1h")
>
>  field(INPB, "DosagePV CP")
>
>  field(CALC, "A+B")
>
>  field(OUT, "Dosage:1h PP")
>
> }
>
> record(ai, "Dosage:1h")
>
> {
>
>  field(PREC, "3")
>
>  field(EGU, "blabla")
>
>  field(PINI,"YES")
>
>  info(autosaveFields_pass0, "VAL")
>
> }
>
> There are other ways to calculate the cumulative dosage: use compress
> record.
>
> I prefer the first approach above. The approach below works only if
> “DosagePV” updates at a regular rate (i.e. 1Hz).
>
> record(compress,"Dosage:1h-Com_")
>
> {
>
>  field(INP,"DosagePV CP")
>
>  field(ALG,"N to 1 Average")
>
>  field(NSAM,"1")
>
>  field(N,"3600")
>
>  field(PREC,"3")
>
>  field(FLNK,"Dosage:1h_")
>
> }
>
> record(calc, "Dosage:1h_")
>
> {
>
>  field(INPA, "Dosage:1h-Com_")
>
>  field(CALC, "3600*A")
>
>  field(PREC, "3")
>
> }
>
> HTH,
>
> Yong Hu
>
> NSLS-II Controls Group
>
> FROM: Tech-talk <tech-talk-bounces@aps.anl.gov> on behalf of
> "tech-talk@aps.anl.gov" <tech-talk@aps.anl.gov>
>  ORGANIZATION: Institut Ruđer Bošković
>  REPLY-TO: Donny Domagoj Cosic <Donny.Domagoj.Cosic@irb.hr>
>  DATE: Thursday, December 5, 2019 at 9:20 AM
>  TO: "tech-talk@aps.anl.gov" <tech-talk@aps.anl.gov>
>  SUBJECT: Record for a running sum
>
> Hello,
>
> I developed an IOC for the radiation monitors found throughout our
>
> laboratory. Through this IOC I am able to read in the values of each
>
> probe and display them nicely using CS-Studio. However I would like to
>
>
> add the ability to the IOC to keep a running sum so I can calculate
> the
>
> cumulative monthly and yearly doses throughout the laboratory but I am
>
>
> not sure how to implement this. I tried searching for similar projects
>
>
> of examples, but without any luck. Would you be able to provide me
> with
>
> some pointers onto how to implement such a feature?
>
> Regards,
>
> Donny
>
> --
>
> Donny Domagoj Cosic
>
>  Institut Ruđer Bošković, Bijenička cesta 54, 10000 Zagreb,
> Croatia