Relay Parameters Exclusive: Fanuc Keep

Once finished, return to the SETTING screen and change PARAMETER WRITE back to 0 . Troubleshooting "Exclusive" Lockouts

Press the button to clear the flashing 100 alarm code. 5. Critical Precautions and Best Practices

: For users not familiar with FANUC systems or CNC parameter settings, managing exclusive relay parameters can add a layer of complexity to machine operation and maintenance.

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

Press the key and locate the SETTING soft key.

To safely enable editing:

To work with Keep Relays, you need access to the PMC maintenance mode. Here is the standard method on a Fanuc 31i/0i-D control. Once finished, return to the SETTING screen and

on the MDI panel.

Unlike D (Data) registers which can be temporary, or R (Internal Relay) bits which are volatile, K parameters are architectural . If one bit is changed, no other feature in the machine should use that same bit for a different purpose.

The underlying ladder logic dictates that these two bits are . If a technician forces both bits to 1 , the PMC logic will either execute a fault routine, generate a custom machine alarm (EX-alarm), or defaults to a safe state to prevent both spindles from trying to command conflicting gear ranges or rotation signals at once. Hard-Coded vs. Logic-Enforced Exclusivity Critical Precautions and Best Practices : For users

| Address | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |---|---|---|---|---|---|---|---|---| | K0000 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | | K0001 | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 0 |

The term in this context refers to two specific scenarios: