[?]: How to protect program in S7 400 PLC ?

[businiao567]

Hi guys,

As i konw,many smartest guys are here.
I have a question about protection thing,hope get help from you.

We can set password in FCs,but it is easy to be cracked.
If i set a password in

'CPU object properties\Protection\Write-/Read Protection '

.
Does anybody can crack it easy or if somebody pick up the memory card, and insert to another PLC,
there is no password protection or some else??

Best Regared!

[sania]

if you have source ,with programm for windows-password recovery - no problem

[komatic]

where i can find this source?

regards...

[CoMod]

I think, that PPP can unprotect your PLC
http://plc.net.ru/viewtopic.php?t=7029& ... t=password

[chic-yong]

each project create two versions. One is debug, other is release, hardware and everything are same.

In debug version project, debugging. Finaly, generate source files(include OB block). Edit source files just generated, remove network segment and other useless nop instructions, add know-howprotect instruction.

copy those modified resource files to release project's source folder, compile. ok

The destination is the fc password cracked, but they can not change it to LAD.

I have a question about protection thing,hope get help from you.
We can set password in FCs,but it is easy to be cracked.
If i set a password in

'CPU object properties\Protection\Write-/Read Protection '

[ghst]

I want to get this, too
Not find better way