Funçãozinha simples:

call function 'HR_BR_CONTRACTUAL_SALARY'
    exporting
        begda                 = gv_primeiro_dia
        endda                 = gv_ultimo_dia
        perno                 = ls_pa0000-pernr
        fc_sw_dec             = space
        calc_currency         = 'BRL'
    tables
        it                    = lt_salario
    exceptions
        no_contractual_salary = 1
        pass_exception        = 2
        others                = 3.