: Enabling or disabling hardware options like chip conveyors, coolant systems, or specific interlocks.
of the cooling fans on the old Fanuc 0i-MC. Elias stared at the screen. The machine was "dead"—no alarms, no errors, just a stubborn refusal to start the spindle. fanuc keep relay parameters exclusive
Never download third-party cracking tools. Illegal modification of safety-related Keep Relays is a violation of OSHA/ISO machinery safety standards. : Enabling or disabling hardware options like chip
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 machine was "dead"—no alarms, no errors, just
— Restoring a full SRAM backup from one machine to another can corrupt exclusive K relay states, causing unexpected alarms or improper axis behavior.
Fanuc keep relay parameters, denoted by the address, are non-volatile memory bits used within the Programmable Machine Controller (PMC) to manage machine-specific logic and system configurations. Unlike standard internal relays (R) that reset when power is lost, keep relays retain their state (0 or 1) even after a machine shutdown, making them essential for persistent settings like tool change flags, interlocks, and optional hardware toggles. Core Functions of Keep Relay Parameters
The term in this context refers to two specific scenarios:
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