constraint_eqn_006 Subroutine

   subroutine constraint_eqn_006(tmp_cc, tmp_con, tmp_err, tmp_symbol, tmp_units)
      !! Equation for epsilon beta-poloidal 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 epsilon beta-poloidal upper limit
      !! #=# physics
      !! #=#=# fbeta_poloidal_eps, beta_poloidal_eps_max
      !! and hence also optional here.
      !! Logic change during pre-factoring: err, symbol, units will be assigned only if present.
      !! fbeta_poloidal_eps : input real : f-value for epsilon beta-poloidal
      !! beta_poloidal_eps_max : input real : maximum (eps*beta_poloidal)
      !! eps : input real : inverse aspect ratio
      !! beta_poloidal : input real : poloidal beta
      use physics_variables, only: beta_poloidal_eps_max, eps, beta_poloidal
      use constraint_variables, only: fbeta_poloidal_eps
      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 - fbeta_poloidal_eps * beta_poloidal_eps_max/(eps*beta_poloidal)
      tmp_con = beta_poloidal_eps_max * (1.0D0 - tmp_cc)
      tmp_err = (eps*beta_poloidal) * tmp_cc
      tmp_symbol = '<'
      tmp_units = ''

   end subroutine constraint_eqn_006