How to modify or change the ATC Macro program (FANUC 0iMF) 

Sometimes, operator wants to change or modify the ATC (M06) macro to meet the request of NC machine running.
First of all, please set the P3202 #4 = 0 (unlock) (P3202#4 = 1 lock)
P6071 = 6 (= M06 macro call) for Macro program O9001