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Protected hardware with password ( before communication )

6/29/2009 4:26 PM	Rate (0)
LipeScofield Posts: 1 Rating: (0)	The situation is as follows: I have a client who has a Siemens PLC (S7-300) which is locked by password. It is not a lock that allows communication with either the CPU (315 PN / DP), the client needs to access the blocks of the program to execute a change in the program due to a change in an instrument in the field. (Flow meter). Have some way to help you with this problem? Many thanks…
LipeScofield Posts: 1 Rating: (0)
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This contribution was helpful to 1 thankful Users AdamLerch

6/29/2009 7:30 PM	Rate (0)
H-H Platinum Member Joined: 7/2/2008 Last visit: 12/21/2025 Posts: 929 Rating: (309)	Hello LipeScofield, I'm sorry but it's very hard to break this password. If there's a solution to break the password, it won't be here on Siemens forum. Try your luck with google. Best regards. H-H

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6/29/2009 7:50 PM	Rate (0)
Lucky123 Gold Member Joined: 12/20/2008 Last visit: 9/3/2025 Posts: 556 Rating: (237)	I think You shouldcall Siemens Tech Support, they are very helpful, if the client agrees to break it up, then Siemens might help you in such case, they have a backdoor password for such cases.

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7/27/2009 4:42 PM	Rate (0)
protivogas Posts: 9 Rating: (0)	Can you remove MMC from the PLC???
protivogas Posts: 9 Rating: (0)
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7/27/2009 4:47 PM	Rate (0)
protivogas Posts: 9 Rating: (0)	sorry for my english ... it's not a problem to uploading programm from PLC ...
protivogas Posts: 9 Rating: (0)
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7/27/2009 8:43 PM	Rate (0)
umencho Grandmaster Joined: 3/21/2006 Last visit: 1/10/2026 Posts: 10247 Rating: (1183)	protivogas ... it's not a problem to uploading programm from PLC ... Hello, What do you mean? Perhaps this FAQ could clear the issue What options exist for assigning passwords? Regards, Hristo Mihalev

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8/21/2009 8:40 AM	Rate (0)
protivogas Posts: 9 Rating: (0)	it's mean that the password protect can crack by the soft (too easy), and you can unprotect all block in user programm (it's need to extract the MMC from PLC). I thik that the best protection now- glue the MMC cars in PLC. :(
protivogas Posts: 9 Rating: (0)
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9/28/2009 8:32 PM	Rate (0)
Manishkools Posts: 50 Rating: (1)	protivogas it's mean that the password protect can crack by the soft (too easy), and you can unprotect all block in user programm (it's need to extract the MMC from PLC). I thik that the best protection now- glue the MMC cars in PLC. :( how to crack password protect????
Manishkools Posts: 50 Rating: (1)
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