Fanuc

Control unit overheat Check that the fan motor operates normally, and clean the air filter.

An I/O link error occurred. The details are listed below.

The assignment of I/O module signals is incorrect.

The maximum allowable number of PMC ladder program steps was
exceeded.

A PMC ROM parity error occurred.

A PMC watchdog timer alarm occurred.

A PMC serial transfer error occurred.

A PMC RAM parity error occurred.

An invalid-instruction interrupt occurred in the PMC.

This alarm is related to the custom macro, macro executor, or order-
made macro (including conversational program inputs). Refer to the
relevant manual for details. (The macro alarm number may coincide
with an overtravel alarm number. However, they can be distinguished
from each other because the overtravel alarm number is
accompanied with the description of the alarm.