little typo in last commited code
add if(is_bool_type(sym)) this->bool_type->accept(*this) in generate_c_il_c::visit(il_default_variable_c*)
to get .BOOLvar instead of .FALSEvar resp. .TRUEvar ..
FUNCTION_BLOCK HYSTERESIS (* Boolean hysteresis on difference *) (* of REAL inputs, XIN1 - XIN2 *) VAR_INPUT XIN1, XIN2, EPS : REAL; END_VAR VAR_OUTPUT Q : BOOL := 0; END_VAR IF Q THEN IF XIN1 < (XIN2 - EPS) THEN Q := 0; END_IF ; ELSIF XIN1 > (XIN2 + EPS) THEN Q := 1 ; END_IF ;END_FUNCTION_BLOCK