This article provides a definitive guide to understanding FANUC Keep Relay parameters, their exclusive nature, and the fundamental management techniques required for safe and effective operation.
Modifying these can be locked out and may require specific permissions from the builder to change. 2. User/Builder Keep Relays ( and above)
Reserved for PMC software data; usually strictly for internal system use. Special Functions
The standout feature is memory retention. If you have a machine that requires a specific configuration to be set once (e.g., "Machine has a 4th axis installed") and never changed again, Keep Relays are the only solution. Using standard internal relays would require the operator to re-enter these settings every morning, which is impractical. fanuc keep relay parameters exclusive
Internal volatile control relays (reset to 0 on power loss).
When set to 1, this "hides" the Timer, Counter, Keep Relay, and Data Table screens entirely. K902.7 / K19.7 (PROTECT PMC PARAM):
: Modifying turret rotation requirements (e.g., allowing rotation without requiring the X/Y axes to be at home) to reduce cycle time. This article provides a definitive guide to understanding
In the context of (Programmable Machine Controller) maintenance, Keep Relay parameters
If you can tell me the and model , I might be able to provide more tailored information regarding their specific use of keep relays. Share public link
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 User/Builder Keep Relays ( and above) Reserved for
This example assumes a FANUC 0i controller.
: For certain system keep relays (like K900), values may only be visible or changeable when the Emergency Stop is pressed. Common Applications
OEMs often use specific Keep Relays as "exclusive" switches to toggle between different machine features—such as enabling a 4th axis, switching between manual and automatic tool measurement, or locking out certain door interlocks for maintenance. Safety & Interlocks: