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Fanuc Keep Relay Parameters Exclusive [Popular • 2026]

If you have lost the password or the OEM is out of business, here are the legal ways to gain exclusive access to Keep Relays:

Never download third-party cracking tools. Illegal modification of safety-related Keep Relays is a violation of OSHA/ISO machinery safety standards. fanuc keep relay parameters exclusive

Keep Relays are processed directly within the PMC scan cycle. Because they are bit-addressable, they are incredibly fast. They do not suffer from the latency sometimes associated with reading/writing to larger Data Tables (D-variables), making them ideal for safety interlocks. If you have lost the password or the

| Keep Relay | Exclusive Function | Controller | |------------|--------------------|-------------| | K17.0 | Enable/Disable soft overtravel check | CNC Series 0i/30i | | K17.1 | Enable absolute position detection | CNC Series 0i | | K9.3 | Power-on automatic reference position return | CNC Series 16i/18i | | K19.0 | Skip signal polarity selection | CNC Series 31i | | K40.0 | Enable/Disable PMC ladder editing | All CNC models | | K43.0 | Tool life management bypass | CNC Series 15i | | K50.0 | Spindle orientation direction | CNC Series 21i | Never download third-party cracking tools

Use spare ranges: Most builders reserve blocks (e.g., K90–K99) for field customization. Stay within those blocks to avoid conflict.

Lock critical bits: Use the FANUC password function or parameter write protection (PWE) to prevent accidental changes.