constraint_eqn_077 Subroutine

   subroutine constraint_eqn_077(tmp_cc, tmp_con, tmp_err, tmp_symbol, tmp_units)
      !! Equation for maximum TF current per turn upper 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 maximum TF current per turn upper limit
      !! #=# tfcoil
      !! #=#=# fcpttf, cpttf, cpttf_max
      !! and hence also optional here.
      !! Logic change during pre-factoring: err, symbol, units will be assigned only if present.
      !! fcpttf : input : f-value for TF coil current per turn
      !! cpttf_max  : input : allowable TF coil current per turn [A/turn]
      !! cpttf  : input : TF coil current per turn [A/turn]
      use constraint_variables, only: fcpttf
      use tfcoil_variables, only: cpttf_max, cpttf
      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 - fcpttf * cpttf_max/cpttf
      tmp_con = cpttf_max
      tmp_err = cpttf_max * tmp_cc
      tmp_symbol = '<'
      tmp_units = 'A/turn'

   end subroutine constraint_eqn_077