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Jose Rodriguez
Jose Rodriguez

S7CanOpener Full Version 41: What You Need to Know Before Using It to Unlock Siemens S7 PLC Blocks


S7CanOpener Full Version 41: What Is It and How to Use It


If you are working with Siemens S7 PLCs, you may have encountered some blocks that are protected with the know_how_protect keyword. This means that you cannot view or modify the source code of these blocks, unless you have the original source file. This can be a problem if you need to troubleshoot, modify, or maintain your PLC program, especially if you have lost your source file or your supplier or integrator does not support it anymore.




S7CanOpener Full Version 41

Fortunately, there is a tool that can help you unlock these protected blocks. It is called S7CanOpener Full Version 41, and it is a software that can set or remove the know_how_protect keyword on S7-300/-400 blocks on the fly. In this article, we will explain what is S7CanOpener, what is its purpose, and what are its main features. We will also show you how to use it step by step, and what are the benefits and limitations of using it. What Is Siemens S7 PLC and Why Is It Protected?


Siemens S7 PLC is a programmable logic controller that is widely used in industrial automation. It is a device that can control various processes and machines by executing a program that consists of logic instructions. A Siemens S7 PLC program is composed of different types of blocks, such as OBs (organization blocks), FCs (function calls), FBs (function blocks), DBs (data blocks), UDTs (user data types), SFCs (system function calls), and SFBs (system function blocks). Some of these blocks can be protected with the know_how_protect keyword. This means that the block can only be viewed or modified by using the original source file that was used to create it. The purpose of this protection is to prevent unauthorized access or modification of the block's code, which may contain confidential or proprietary information. However, this protection can also cause some inconveniences for the users who need to access or modify these blocks for legitimate reasons. How to Unlock Siemens S7 PLC Blocks with S7CanOpener




To unlock Siemens S7 PLC blocks with S7CanOpener, you need to follow these steps:


Requirements and Precautions




Before you use S7CanOpener, you need to make sure that you have the following requirements:


  • A PC with Windows XP or higher operating system



  • A licensed copy of S7CanOpener Full Version 41, which you can purchase from https://www.mhj-tools.com/s7canopener/



  • A Siemens S7 PLC project or library file that contains the blocks you want to unlock



  • A backup copy of your project or library file, in case something goes wrong



You also need to take some precautions before using S7CanOpener, such as:


  • Closing all other applications that may interfere with S7CanOpener, such as Simatic Manager, Step 7, or WinCC



  • Not using S7CanOpener on blocks that are currently running on the PLC, as this may cause errors or malfunctions



  • Not using S7CanOpener on blocks that are protected by other means, such as online password or block privacy protection, as this may damage the blocks or make them unusable



  • Not using S7CanOpener for illegal or unethical purposes, such as stealing or modifying someone else's code without permission



Opening a Project or Library




After you have met the requirements and taken the precautions, you can start using S7CanOpener by opening a project or library file that contains the blocks you want to unlock. To do this, follow these steps:


  • Launch S7CanOpener by double-clicking on its icon on your desktop or in your start menu



  • Click on the "Open Project" button on the toolbar, or select "File -> Open Project" from the menu bar



  • Browse to the location of your project or library file, and select it. You can open files with extensions such as .s7p, .s7l, .s7a, .scl, .awl, .dbf, etc.



  • Click on the "Open" button to load the file into S7CanOpener. You will see a tree view of the file's structure on the left panel, and a list of blocks on the right panel



  • Select the folder that contains the blocks you want to unlock. You can select folders such as OBs, FCs, FBs, DBs, UDTs, etc.



Modifying the Protection Status




After you have opened a project or library file and selected a folder of blocks, you can modify the protection status of these blocks with S7CanOpener. To do this, follow these steps:


  • Select the blocks you want to protect or unprotect. You can select multiple blocks by holding down the Ctrl key while clicking on them. You can also select all blocks in a folder by clicking on the "Select All" button on the toolbar, or by pressing Ctrl+A on your keyboard



  • Click on the "Protect" button on the toolbar, or select "Edit -> Protect" from the menu bar, to protect the selected blocks. This will add the know_how_protect keyword to these blocks, and prevent them from being viewed or modified without the original source file



  • Click on the "Unprotect" button on the toolbar, or select "Edit -> Unprotect" from the menu bar, to unprotect the selected blocks. This will remove the know_how_protect keyword from these blocks, and allow them to be viewed or modified with any tool that supports Siemens S7 PLC programming



  • Click on the "Save Project" button on the toolbar, or select "File -> Save Project" from the menu bar, to save the changes you have made to your project or library file. You can also save your file with a different name by selecting "File -> Save Project As"



  • Verify that your changes have been applied by opening your project or library file with another tool, such as Simatic Manager or Step 7. You should be able to view or modify the blocks that you have unprotected with S7CanOpener



Benefits and Limitations of Using S7CanOpener




Using S7CanOpener can have some benefits and limitations for Siemens S7 PLC users. Here are some of them:


Benefits




  • Accessing the source code: By using S7CanOpener, you can access the source code of any protected block, and view or modify it as you wish. This can help you troubleshoot, optimize, or customize your PLC program, and learn from other programmers' code.



  • Saving time and space: By using S7CanOpener, you can save time and space by not having to keep or search for the original source files of your protected blocks. You can also reduce the size of your project or library file by removing the unnecessary protection keywords.



  • Avoiding dependency on suppliers or integrators: By using S7CanOpener, you can avoid being dependent on your suppliers or integrators for providing or supporting your protected blocks. You can also avoid paying extra fees or waiting for long periods for getting access to your blocks.



Limitations




  • Not being able to unlock SFCs and SFBs: S7CanOpener can only unlock OBs, FCs, FBs, DBs, and UDTs. It cannot unlock SFCs and SFBs, which are system blocks that are provided by Siemens. These blocks are protected by a different mechanism that cannot be bypassed by S7CanOpener.



  • Not being able to reverse SCL or CFC blocks: S7CanOpener can only unlock blocks that are written in STL (statement list) or LAD (ladder diagram) languages. It cannot unlock blocks that are written in SCL (structured control language) or CFC (continuous function chart) languages. These blocks are compiled into binary code that cannot be reversed by S7CanOpener.



  • Not being able to remove online password or block privacy protection: S7CanOpener can only remove the know_how_protect keyword from the blocks. It cannot remove other types of protection that may be applied to the blocks, such as online password or block privacy protection. These types of protection require a different tool or method to be removed.



Conclusion and FAQs




In conclusion, S7CanOpener Full Version 41 is a useful tool that can unlock the protection of Siemens S7 PLC blocks on the fly. It can help you access, view, or modify the source code of any protected block, and save time, space, and money. However, it also has some limitations, such as not being able to unlock SFCs and SFBs, not being able to reverse SCL or CFC blocks, and not being able to remove online password or block privacy protection. Therefore, you should use it with caution and responsibility, and always have a backup copy of your project or library file before using it.


Here are some FAQs about S7CanOpener:


  • What is the difference between S7CanOpener Full Version 41 and S7CanOpener Lite Version 41?The main difference is that the full version can protect or unprotect multiple blocks at once, while the lite version can only do it one by one. The full version also has some additional features, such as sorting the blocks by name or number, filtering the blocks by type or status, and displaying the block comments.



  • How much does S7CanOpener cost and how can I buy it?S7CanOpener Full Version 41 costs 250 euros per license, while S7CanOpener Lite Version 41 costs 100 euros per license. You can buy them online from https://www.mhj-tools.com/s7canopener/, where you can also download a free trial version that works for 30 days.



  • Is S7CanOpener legal and safe to use?S7CanOpener is legal and safe to use as long as you use it for your own projects or libraries, and not for stealing or modifying someone else's code without permission. You should also respect the intellectual property rights of the original programmers who created the protected blocks. However, you should be aware that using S7CanOpener may void your warranty or support contract with Siemens or your supplier or integrator.



  • Does S7CanOpener work with all versions of Siemens S7 PLCs?S7CanOpener works with all versions of Siemens S7-300/-400 PLCs that use Step 7 software for programming. It does not work with Siemens S7- 1200/-1500 PLCs that use TIA Portal software for programming. It also does not work with Siemens S7-200 PLCs that use MicroWin software for programming.



  • Can S7CanOpener unlock other types of files or formats?S7CanOpener can only unlock Siemens S7 PLC project or library files that are stored in the local disk of your PC. It cannot unlock files that are stored in the PLC memory, or files that are in other formats, such as .pdf, .doc, .xls, etc.



I hope you have found this article helpful and informative. If you have any questions or comments, please feel free to contact me at contentwriter@example.com. Thank you for reading! dcd2dc6462


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