constraint_eqn_079 Subroutine

   subroutine constraint_eqn_079(tmp_cc, tmp_con, tmp_err, tmp_symbol, tmp_units)
      !! Equation for maximum CS field
      !! 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 CS field
      !! #=# pfcoil
      !! #=#=# fbmaxcs, bmaxoh, bmaxoh0, bmaxcs_lim
      !! and hence also optional here.
      !! Logic change during pre-factoring: err, symbol, units will be assigned only if present.
      !! fbmaxcs : input : F-value for CS mmax field (cons. 79, itvar 149)
      !! bmaxcs_lim : input : Central solenoid max field limit [T]
      !! bmaxoh0 : input : maximum field in central solenoid at beginning of pulse (T)
      !! bmaxoh : input real : maximum field in central solenoid at end of flat-top (EoF) (T)
      !! (Note: original code has "bmaxoh/bmaxoh0 |  peak CS field [T]".)
      use pfcoil_variables, only: fbmaxcs, bmaxcs_lim, bmaxoh0, bmaxoh
      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 - fbmaxcs * bmaxcs_lim/max(bmaxoh, bmaxoh0)
      tmp_con    = bmaxcs_lim
      tmp_err    = max(bmaxoh, bmaxoh0) * tmp_cc
      tmp_symbol = '<'
      tmp_units  = 'A/turn'

   end subroutine constraint_eqn_079