Unblock "Know_how_protected"

haiunilever · Dec 18, 2005

Hi all,
I have implemented a project using Siemens PCS7 in which there are some blocks written under SCL.
But the programmer applied the "know_how_protected" then deleted all the SCL sourcecode.

Now I face many difficulties to develop the function because I cannot view the function block under SCL code (only STL) or I cannot view the code because of "know_how_protected".

Does anyone know anyway to convert the STL back to SCL or unlock the "know_how_protected", please send me a solution! I need your help!

Thank you very much!
Regards,
Hai

dchartier · Dec 18, 2005

Hello Hai;
Contact Luca Gallina ar runmode.com. He has developped a tool he calls S7CanOpener to allow a user to remove the Know-How-Protect from source files. However, you should ask him if this will help you in this particular case, I have no idea if his code works for SCL sources.
Hope this helps,
Daniel Chartier

10baseT · Dec 19, 2005

Not relevent I know - and no one seems to take PLC code piracy as an issue , but unlocking the block may contravene copyright . Unlocking it is no problem , but modifying , reverse engineering it or copying it may not be legal .

BNA · Dec 19, 2005

Hi haiunilever

This might help.

http://www.plctalk.net/qanda/showthread.php?t=16993

Not relevent I know - and no one seems to take PLC code piracy as an issue , but unlocking the block may contravene copyright . Unlocking it is no problem , but modifying , reverse engineering it or copying it may not be legal .

Hmmmm. My opinion is that the plc code made for machinery, payed by the customer is owend by the costumer. Our company policy is to deliver software along with documentation.

I would like to start an opinion poll - "Is it piracy to remove know-how protection ???"

Regards
Brian

10baseT · Dec 19, 2005

Whilst your opinion may be valid - the law may not see it that way . In most cases , copyright remains with the writer unless specifically passed over to the customer .

sunil panchal · Sep 29, 2010

Hi I want to unlock sfc0 & sfc1 blocks in s7-300 program,If anybody knows the solution please tell me at the earliest.

L D[AR2P#0.0] · Sep 29, 2010

sunil panchal said:
Hi I want to unlock sfc0 & sfc1 blocks in s7-300 program...

...why ?

JRW · Sep 29, 2010

I know this is an old thread but with Step7 5.5
and FW 3.x that Canopener stuff won't work.
128 bit encryption is here

ojz0r · Sep 30, 2010

sunil panchal said:
Hi I want to unlock sfc0 & sfc1 blocks in s7-300 program,If anybody knows the solution please tell me at the earliest.

The sfc's are built in functions by siemens so why do you want to open them?

sunil panchal · Sep 30, 2010

Thanx! I am working on the project & original program has been lost,so I have uploaded the programme from plc(s7-300) but sfc0 & sfc1 blocks are locked by know_how_protection,& I have to give some time events thats why I need to open these blocks again...........can anybody help me ASAP,

L D[AR2P#0.0] · Sep 30, 2010

See post #9 - SFCs are built into the CPU so all you get in the project is a stub giving the interface which shows you the parameters required by the SFC.

TurpoUrpo · Sep 30, 2010

just hit F1 on SFC and it explains its use.

Unblock "Know_how_protected"

haiunilever

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dchartier

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10baseT

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BNA

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10baseT

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sunil panchal

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L D[AR2P#0.0]

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JRW

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ojz0r

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sunil panchal

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L D[AR2P#0.0]

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TurpoUrpo

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