— When troubleshooting, technicians must know which K relays are exclusive. Misdiagnosis occurs when a general-purpose K relay is mistaken for a fixed-function one (or vice versa).
FANUC provides the control platform, but the Machine Tool Builder (e.g., Doosan, Mazak, Mori Seiki) writes the Keep Relay definitions. Always use the manual provided by the builder, not standard FANUC manuals, to decode K-parameters.
If you are unsure whether two K parameters are exclusive, you must consult the ladder diagram provided by the machine tool builder (e.g., Mori Seiki, Doosan, Haas, Mazak). Within the ladder logic, you will often find interlock coils or branch circuits where one contact is normally open (NO) and the other is normally closed (NC). 2. Monitor PMC Signals via Diagnosis fanuc keep relay parameters exclusive
: Enabling or disabling options like a chip conveyor, high-pressure coolant, or an optional tool magazine.
Use the arrow keys to navigate to the exact keep relay address and bit you want to change (e.g., K5.4). Type the new value (1 for ON, 0 for OFF) and press . Finalize and Reset: Revert the Parameter Write Enable (PWE) back to 0. Press the RESET key to clear the parameter write alarm. — When troubleshooting, technicians must know which K
The keyword here carries three distinct technical meanings. When we say Fanuc Keep Relay parameters exclusive , we are referring to:
Write any modified Keep Relay values on a label inside the electrical cabinet door. If the CNC memory ever wipes, future technicians will know exactly how the machine logic was customized. Always use the manual provided by the builder,
Activating or deactivating features like tailstocks, steady rests, or chip conveyors.