The spindle amplifier will issue Alarm 15 if more than one second elapses from the transition of a switch request signal until a power line state check signal makes the required transition.
7115 Alarm Message: OVERSPeed (or related parameter error) Applicable Systems: Fanuc Series 16i/18i/21i, 16/18/21, 0i, and 30i Series controls.
: The "Requested Packet Interval" (RPI) is set too low for the network traffic, causing the connection to drop. Troubleshooting Steps
Did this alarm happen (like a high-speed G00 rapid move) or immediately upon powering up ?
Measure the output of the 24V power supplies in the electrical cabinet. Even if they show 24V with a multimeter, they may be failing under load. Inspect Spindle Contactors:
