Experimental Physics and
Industrial Control System

"Meddage, Varuna via Tech-talk" <tech-talk at aps.anl.gov> · Tue, 1 Nov 2022 15:08:11 +0000

Hi,

I have following "calc" type record in one of my .db files.

===============================================================

record(calc,"$(detector)_wib$(crate)0$(wib)/calc")
{
      field(SCAN,"5 second")
      field(CALC,"((A>=4.6&&A<=5.2)&&(B>=4.6&&B<=5.2)&&(C>=1.75&&C<=1.80)&&(D>=3.2&&D<=3.4)&&(E>=0.7&&E<=2.0))?1:0")
      field(INPA,"$(detector)_wib$(crate)0$(wib)/vcc")
      field(INPB,"$(detector)_wib$(crate)0$(wib)/v1")
      field(INPC,"$(detector)_wib$(crate)0$(wib)/v2")
      field(INPD,"$(detector)_wib$(crate)0$(wib)/v3")
      field(INPE,"$(detector)_wib$(crate)0$(wib)/v4")
      field(DESC,"")
      field(HIHI,"")
      field(HIGH,"")
      field(LOW,"")
      field(LOLO,"")
      field(MDEL,"-1")
      field(ADEL,"-1")
      field(OOPT,"Every Time")
      field(PREC,"6")
}

===============================================================

When I run the EPICS, then I get an error message saying "String is too long" complaining about the expression, I inserted inside the "CALC" field in this record. But when I reduced the number of input PVs of this record from 5 to 4 and rewrite the expression inside "CALC" field, then there is no error.

Is there maximum number of input PVs, that I can use inside a "calc" type record ?

Any help to understand this issue is highly appreciated.

Thanks

Varuna Meddage

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System