Fanuc Keep Relay Parameters Exclusive !!top!!

When a peripheral device is missing or bypassed for testing, technicians can use a dedicated K bit to suppress the associated alarm in the ladder logic, allowing the machine to continue basic operation.

Defined by the Original Equipment Manufacturer (OEM) to control specific machine functions like chip conveyors, coolant behavior, or turret rotation logic.

Note: Some exclusive keep relays require a complete control power cycle to initialize their new state. Critical Safety Warnings and Best Practices fanuc keep relay parameters exclusive

Never modify a single bit without backing up the CNC parameters and PMC data to a USB flash drive or memory card.

Because tampering with keep relays bypasses standard safety interlocks and operational parameters, strict discipline is required. When a peripheral device is missing or bypassed

The machine finally clicked. The bar feeder pushed, the parts catcher waited its turn, and the exclusivity was resolved without a single alarm. Elias turned PWE back to

Reserved for PMC software data; usually strictly for internal system use. Special Functions Critical Safety Warnings and Best Practices Never modify

The CNC will display a flashing 100 PARAMETER WRITE ENABLE alarm. This is normal and serves as a safety warning. Step 2: Navigate to the PMC Keep Relays Press the function key. Press the PMC or PMC MNT (PMC Maintenance) softkey. Press the PMCPRM (PMC Parameter) softkey. Press the KEEPRL (Keep Relay) softkey.

The concept of "exclusive" parameters adds a layer of security. By reserving specific K-addresses for specific hardware options, the PMC logic can be written to check these bits. If an operator accidentally tries to activate a function for which the exclusive bit is OFF, the logic denies the action immediately. This prevents "phantom" operations where the code runs but the hardware isn't there (preventing crashes).