To change a keep relay, you must first enable "Parameter Write" to avoid "Write Protect" alarms. Enable Writing [OFFSET/SETTING] function key. Select the soft key and change PARAMETER WRITE Navigate to Keep Relays function key. [PMC MAINTENANCE] Select the [KEEP RELAY] soft key to view the list. Edit the Bit
To work with Keep Relays, you need access to the PMC maintenance mode. Here is the standard method on a Fanuc 31i/0i-D control. fanuc keep relay parameters exclusive
However, a common pitfall in shops and integration shops is the mismanagement of these bits. This article focuses on a single, golden rule: To change a keep relay, you must first
If documentation is missing, you can search for the "K" address directly within the PLC ladder on the CNC screen to see what output it triggers. Fryer Machine Systems How to Enable Parameter Write Enable (PWE) on a Fanuc CNC [PMC MAINTENANCE] Select the [KEEP RELAY] soft key
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.