Experimental Physics and
Industrial Control System

Hi Donny,

 

Firstly welcome to the EPICS community! You did very well in just one month.

 

Yes, you are in the right direction. See below highlighted: just one small change and two more records that save "Dosage:1h" value to “PreviousDosage:1h” before every reset. Again, the example below only shows “reset every minute”.

 

You said “…that saves the "Dosage:1h" values before every reset”. If you really mean “values” instead of “value”, then you need another compress record with field(ALG," Circular Buffer ") and field(INP," PreviousDosage:1h CP"). See https://wiki-ext.aps.anl.gov/epics/index.php/RRM_3-14 to find out more details on calcout, compress, etc.

 

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")

    field(FLNK,"PreviousDosage:1h-Calc_")

}

 

record(calcout, "PreviousDosage:1h-Calc_")

{

    field(INPA,"Dosage:1h-Calc_")

    field(INPB,"Dosage:1h")

    field(CALC,"B")

    field(OOPT,"Transition To Zero" )

    field(DOPT,"Use OCAL")

    field(OCAL,"A")

    field(OUT,  "PreviousDosage:1h PP")

}

 

record(ai, "PreviousDosage:1h")

{

    field(PREC, "3")

    field(EGU,  "blabla")

    field(PINI,"YES")

    info(autosaveFields_pass0, "VAL")

}

 

 

On 12/11/19, 3:41 AM, "Donny Domagoj Cosic" <[email protected]> wrote:

 

    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 <[email protected]> on behalf of

    > "[email protected]" <[email protected]>

    >  ORGANIZATION: Institut Ruđer Bošković

    >  REPLY-TO: Donny Domagoj Cosic <[email protected]>

    >  DATE: Thursday, December 5, 2019 at 9:20 AM

    >  TO: "[email protected]" <[email protected]>

    >  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