To read single element from waveform record

[ishita bhatia <ishita3006@gmail.com>]

Hello,

I have a waveform record with 4 elements with  ftvl=USHORT. How to read a single element from waveform using subArray or acalcout record or any other record.  I have tried using subarray as

record(waveform, optoRead) {

  field(SCAN, "Passive")

  field(NELM, "4")

  field(FTVL, "USHORT")

  field(DTYP, "wafoptosupport")

  field(FLNK, "optolinks")

}

record(subArray, opto1) {

  field(SCAN, "Passive")

  field(DTYP, "Soft Channel")

  field(FTVL, "USHORT")

  field(INP, "optoRead")

  field(INDX, "0")

  field(FLNK, "opto1Binary")

  field(MALM, "2")

  field(NELM, "1")

}

record(subArray, opto2) {

  field(SCAN, "Passive")

  field(DTYP, "Soft Channel")

  field(INP, "optoRead")

  field(MALM, "4")

  field(INDX, "1")

  field(FLNK, "opto2Binary")

  field(FTVL, "USHORT")

  field(NELM, "1")

}

record(subArray, opto3) {

  field(SCAN, "Passive")

  field(DTYP, "Soft Channel")

  field(INP, "optoRead")

  field(MALM, "4")

  field(INDX, "2")

  field(FLNK, "opto2Binary")

  field(FTVL, "USHORT")

  field(NELM, "1")

}

record(subArray, opto4) {

  field(SCAN, "Passive")

  field(DTYP, "Soft Channel")

  field(INP, "optoRead")

  field(MALM, "4")

  field(INDX, "3")

  field(FLNK, "opto2Binary")

  field(FTVL, "USHORT")

  field(NELM, "1")

}

but it doesn't works. Everytime on doing caget it prints just the first element of waveform.