constraint_eqn_015 Subroutine

   subroutine constraint_eqn_015(tmp_cc, tmp_con, tmp_err, tmp_symbol, tmp_units)
      !! Equation for L-H power threshold limit
      !! author: P B Lloyd, CCFE, Culham Science Centre
      !! args : output structure : residual error; constraint value;
      !! residual error in physical units; output string; units string
      !! Equation for L-H power threshold limit
      !! #=# physics
      !! #=#=# fl_h_threshold, p_l_h_threshold_mw
      !! and hence also optional here.
      !! Logic change during pre-factoring: err, symbol, units will be assigned only if present.
      !! fl_h_threshold : input real : f-value for L-H power threshold
      !! p_l_h_threshold_mw : input real : L-H mode power threshold (MW)
      !! pdivt : input real : power to conducted to the divertor region (MW)
      use constraint_variables, only: fl_h_threshold
      use physics_variables, only: p_l_h_threshold_mw, pdivt
      implicit none
            real(dp), intent(out) :: tmp_cc
      real(dp), intent(out) :: tmp_con
      real(dp), intent(out) :: tmp_err
      character(len=1), intent(out) :: tmp_symbol
      character(len=10), intent(out) :: tmp_units

      tmp_cc =  -(1.0D0 - fl_h_threshold * p_l_h_threshold_mw / pdivt)
      tmp_con = p_l_h_threshold_mw
      tmp_err = p_l_h_threshold_mw - pdivt / fl_h_threshold
      if (fl_h_threshold > 1.0D0) then
         tmp_symbol = '>'
      else
         tmp_symbol = '<'
      end if
      tmp_units = 'MW'

   end subroutine constraint_eqn_015