90-30 PLC copy

[Guest bogdan]

hi, does anyone know if it is possible to upread the program from protected PLC (FANUC 90-30, cpu331). If yes, what is the way ? thanks in advance. bogdan.

[Steve Bailey 118]

The only way I know of is to get the password. You can try contacting the original manufacturer of the machine or the original programmer. If you're forced to guess, there are 65536 possibilities. The password is a 4-digit hex value between 0000 and ffff. A lot of manufacturers that use passwords tend to use the same password for every machine so the field service people will be able to remember them. Try variations on the machine's model number or the telephone number of the manufacturer's home office. Try the machine's serial number. Put yourself in the position of the engineer at the machine builder. You need to come up with a password strategy that will prevent unauthorized people from accessing the code, but you need to make it possible for authorized people to get access at any hour of the day or night. How would you approach the task? Of course, it's possible that the password is random and unique to your PLC. In that case, if you can try one number every 5 seconds, it will only take you 91 hours to try out all the combinations.