If you just want to check if this method works, try to clear your own project's password with this number. Go to the 'Controller Properties' > 'Passwords'.
Number 2: I also found a master password that I use to clear the protection. If a had some more time I'll try to port this patch to other versions of RSLogix. Save this file with a new name like, rs500_nopw.exe and try. We replace some instruction by nops and it's done. (My patch is for RSLogix 500 Version 8.10.00 (CPR 9) Build 18 Number 1: You can just patch some bytes and bypass the password check to upload(plc->pc) a program.
Now it's simple, after some hours debugging the rslogix I found some interesting things inside this software. In return I wanto to share my private solution for this problem and for all the rslogix 500 compatibles plcs (tested for real with micrologix 1100,1200,1400 Serial and ethernet comms).
Hi, I'm new here, and first want to thanks you people for share the tools to our work.