So, we have one servovalve that is very critical to machine operation and idea is (or was) to detect if valve gets disconnected from analog output card. I enabled all diagnostics on analog output card, but when valve is disconnected (wire break) there is nothing coming from diagnostics, so we can't detect servovalve fault. Card is question is AQ 4xU/I ST (6ES7 135-6HD00-0BA1I Is there something I'm missing out? Is it possible to do what I'm trying or?