1. Purpose & Function Parameter 8901 controls the Axis Interlock function on FANUC Series 0i, 30i/31i/32i, and other compatible controls.

In simple terms: It defines which axes are allowed to move when the interlock is overridden. Each bit corresponds to a specific axis. Bits are typically set from the least significant bit (LSB) upward.

It determines when the Interlock Release Signal ( *IT ) is activated.

Set P8901 = 00000111 (binary) = 7 (decimal)