The security key authentication function registers a security key in a program file and prevents unauthorized execution or access
to the program.You can set this function with the following two methods.

(1) Preventing unauthorized access to a program
　  This function allows or does not allows an operation to the program depending on whether a security key in the program file
      and the one of a personal computer match or not.



(2) Preventing unauthorized execution of a program in a CPU module
　  This function allows or does not allows an operation to the program depending on whether a security key in the program file
      written in a CPU module and the one of the CPU module match or not.



For details, refer to the following manual.
 - GX Works3 Operating Manual 5. MAINTENANCE AND INSPECTION 15. PROTECTING DATA
   15.2 Preventing Illegal Access to Programs (Protected by Key)