In FANUC controllers, Keep Relays (K parameters) are a type of within the PMC (Programmable Machine Controller). While standard relays (R) lose their state when power is cut, Keep Relays are backed by battery power or non-volatile memory, so their stored values persist unchanged.
They act as switches within the PMC ladder logic to control machine functionality. Why "Keep Relay Parameters Exclusive"? fanuc keep relay parameters exclusive
— Some exclusive K relays directly control emergency stop behavior or hardware interlocks. Changing them outside FANUC specifications can create hazardous conditions. In FANUC controllers, Keep Relays (K parameters) are
Always consult your machine's original documentation or the OEM ladder diagram before changing Keep Relays, as they are specific to each machine builder and changing the wrong bit can disable critical safety features or machine functions. common K-relay addresses used by specific manufacturers like Haas or Mori Seiki? Why "Keep Relay Parameters Exclusive"
Scroll the soft keys to find (Keep Relay). Press it.