Fanuc Keep Relay Parameters Exclusive New!

The system cannot process external material handling signals from two distinct sources simultaneously. Hydraulic Chucking (Internal) K05.3 Hydraulic Chucking (External)

are bit-based and function as simple on/off toggle switches. Data tables are word-based, storing variable values for use in PMC computations.

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 fanuc keep relay parameters exclusive

Often found in lower K-numbers (e.g., K0.0 or K1.1), allowing the machine to run with the door open for maintenance.

MTBs often write specific safety traps into the PMC. Assigning mutually exclusive bits to 1 simultaneously will frequently trigger a custom 1000+ series operator message (e.g., 1054: INVALID CONFIGURATION SELECTION ). The system cannot process external material handling signals

Find the steps to (e.g., door interlock or conveyor)?

Keep relays, designated as (or K-registers) in FANUC PMCs, are non-volatile internal memory addresses. Unlike standard internal relays (R-addresses) that reset when the CNC machine loses power, keep relays retain their state (0 or 1) even after a complete control power cycle. If a sensor is faulty but doesn't prevent

By respecting the architecture of exclusive keep relay parameters, you ensure that any optimizations or feature toggles you introduce remain fully aligned with the machine's built-in safety logic.

K0 through K15 are typically reserved for the machine sequence (builder-defined), while K16 and higher are often reserved for system management. 2. Common Keep Relay Examples

Address Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 K0000 0 0 0 1 0 1 0 0 K0001 1 0 0 0 0 0 0 0 Step 3: Changing the Exclusive Bit

Before changing a single bit, take a photograph of the keep relay screen or write down the existing sequence of 1s and 0s. If the machine behaves erratically after the change, you must be able to restore it to its original state.