PPFUN STARTSUB(50) - NC-subprogram start command

NC-subprogram start command PPFUN STARTSUB(50) together with the NC-subprogram end command PPFUN ENDSUB(51) is used to mark out the technology commands of the subprogram. All technology commands between PPFUN STARTSUB(50) and PPFUN ENDSUB(51), are considered to be NC-subprogram commands. Main program commands are processed consecutively, whereas the NC-subprogram commands are skipped. The NC-subprogram commands are translated only when NC-subprogram output operators are called from one of the main program commands.

CLD[2] parameter holds the unique identifier of the NC-subprogram.

Access from sppx

PPFUN has no sub-code-specific handler in sppx. All PPFUN sub-codes are processed in the single program PPFun handler, dispatching on cld[1] (CLD.SubCode); handle STARTSUB by adding a branch there. See Postprocessor function (PPFUN) for the full handler.

Example (from the Fanuc (30i)_Mill postprocessor):

program PPFun
  case cld[1] of
      50: begin ! StartSub
        OutBlock;
        Output ""
        Output "%"
        ProgNum = MainProgramID + CLD[2]; ProgNum@ = MaxReal
        if CLData$<>"" then
          Output OutStr$ + " (" + UPCASE(CLData$) + ")"
        OutBlock
        Interp_ = MaxReal; Interp_@ = Interp_
        Feed_ = MaxReal; Feed_@ = Feed_
      end
  end
end

Access from .NET

In addition to the base OnPPFun, this sub-code raises the dedicated handler OnStartNCSub:

public override void OnStartNCSub(ICLDSub sub, ICLDPPFunCommand cmd, CLDArray cld)

The common .NET model (members, 1-based vs 0-based index) is described in Postprocessor function (PPFUN).

Example - OnStartNCSub (from the Heidenhain_Mill_iTNC530_DN postprocessor):

public override void OnStartNCSub(ICLDSub cldSub, ICLDPPFunCommand cmd, CLDArray cld)
{
    //433 LBL101
    cldSub.Tag = 100 + cldSub.SubCode;
    nc.WriteLine();
    nc.OutText($"LBL{cldSub.Tag}");
}

See also