Fanuc Keep — Relay Parameters Exclusive ((better))

Critical safety functions—like two-hand controls, light curtain responses, or emergency stop resets—are often mapped to dedicated Keep Relays. Making these parameters exclusive prevents a floor operator from setting K123.4 = 1 to bypass a guard switch. Doing so could lead to severe injury.

To change an exclusive K-relay setting, you must typically follow these steps to unlock the system: Enable PWE: , press the OFFSET/SETTING key, find the "SETTING" soft key, and change PARAMETER WRITE (PWE) from 0 to 1. Navigate to PMC: hard key, then use the right arrow soft keys to find PMC MAINTENANCE Access Keep Relays: Select the KEEP RELAY Edit Values: fanuc keep relay parameters exclusive

Press the key and locate the SETTING soft key. To change an exclusive K-relay setting, you must

Keep Relays (K Parameters) are non-volatile internal relays within the Programmable Machine Control (PMC) that retain their state (0 or 1) even after the machine is powered down. They are primarily used by Machine Tool Builders (MTBs) to toggle specific options, manage maintenance modes, or bypass safety interlocks without rewriting the PLC ladder logic. Accessing and Modifying Keep Relays They are primarily used by Machine Tool Builders