[Active Record] Order by field

Hi there

I'm using CI 3.1.4 and have a problem with 'order by field'.

Code:

...
$this->db->where_in('table.column',$artIDs);
$order = sprintf('FIELD(table.column, %s)', implode(', ', $artIDs));
$this->db->protect_identifiers(FALSE)->order_by($order);
$this->db->limit((int)$limit,(int)$start);

 return $this->db->get();

I'm propably doing something wrong. Can anyone help me? Thanks in advance.