check why master go non -op state

He to all ...
Recently we wold solve an annoing problem .... we use old I5 6500 from long time .... and every new makine using that cpu on h110 motherboard based .... sometime some makine have these problem ... after long time master go to non OP state .... than go up again .... not understand if simply for some reason we go out of latency limit .... but think in that case linuxcnc need to go on error and crash ... so think about other problem ... but because I'm not an expert on signal transfert I ask to someone if there are a way to chek latency issue on ethercat .... or pc issue on ethercat .... or LAN type issue on ethercat durign a long time period .... like 48 hour for example .... actually I use lcec.state-op whitout succes on these specific issue .... so think an issue regarding cable lenght (6mt from master to first motor, because integrated servo) .....

thank a lot for these help ...
bkt