Because this range influences core system behavior, these parameters are generally not documented in standard user manuals and should be modified only by authorized service technicians when activating specific hardware options or performing advanced diagnostics.
The bit is being written to by a "coil" in the PMC ladder logic. In this case, the software overrides any manual changes.
When we talk about , we are referring to the specific, often system-critical K-bits ( K0.0cap K 0.0 K999.7cap K 999.7 fanuc keep relay parameters exclusive
If a sensor is faulty but doesn't prevent safe operation, a keep relay can sometimes "shield" or bypass that specific alarm to keep the machine running until parts arrive. Troubleshooting and Safety Warnings
Activating both overrides safety matrices, blinding the CNC to physical door states. Internal Barfeeder Interface K12.4 External Robot Interface Because this range influences core system behavior, these
The you are trying to change (e.g., bar feeder, coolant). If you have the electrical manual for the machine. Share public link
In PMC ladder logic maintenance, specific addresses may be processed using Exclusive-OR When we talk about , we are referring
— 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).
Changes take effect immediately in the PMC logic. If you cannot edit Keep Relays after following these steps, check for a custom protection relay like controlling write access to the ladder memory area, or parameter 3299#0 restricting write operations.
Locate the (PWE) setting. Change it from 0 to 1. The control will likely throw an alarm (e.g., Write Enable Parameter ). This is normal. Access the PMC Screen: Press the SYSTEM hard key.
The importance of Fanuc keep relay parameters exclusive cannot be overstated. Here are some reasons why: