The 900 parameters are essentially the "firmware" settings of your lathe. While it's tempting to "turn everything on," incorrect settings can cause system crashes or render the machine unresponsive. before making changes, as many older 0-T controls do not have a "factory reset" button that restores these specific bits. Fanuc Ot 900 Parameter List - Google Groups
He had the 900-parameter list—a wrinkled, coffee-stained printout taped inside the electrical cabinet. It was a ghost map. Fanuc had long since declared those parameters “factory-only.” But on a machine from 1987, “factory-only” meant “find a graveyard or get creative.” fanuc ot 900 parameter list
Locate and change it from 0 to 1 .