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S7 Can Opener



What is S7 Can Opener and How to Use It?




If you are working with PLC SIEMENS S7-300/400 blocks, you may have encountered the problem of accessing your compiled blocks that are protected with the "know_how_protect" keyword. This can happen when you lose your source code, or when your software supplier or system integrator does not support the software they developed anymore. In such cases, you need a tool that can help you unlock your protected blocks and modify them as you wish. That tool is S7 Can Opener.




S7 Can Opener


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What is S7 Can Opener?




S7 Can Opener is a software program that can remove the protection from S7 blocks that are marked with the "know_how_protect" keyword. It works on S7 programs (*.s7p) and S7 libraries (*.s7l) and it can handle different block families (FBs, FCs, OBs, DBs). It can also toggle the protection status on-the-fly, without having to compile your blocks.


How to Use S7 Can Opener?




To use S7 Can Opener, you need to follow these steps:


  • Make a backup copy of your Step7 project before using S7 Can Opener. This is a precautionary measure in case something goes wrong.



  • Close all applications that may interfere with Step7 project files, such as S7 Manager, S7 editor, Protool, etc.



  • Run CanOpener.exe and from the "Open" menu select the desired S7 project or library. You will see a list of all "blocks" folders in the project.



  • Select the "blocks" folder that contains the blocks you want to modify. You can filter different block families using the buttons at the bottom of the window.



  • Select the blocks you want to change the protection status of. You can use multiple selection by holding down the Ctrl key.



  • Use the "Protect" or "Unprotect" buttons to set or remove the protection. You will be asked for a password at the first request each time you run the program.



Where to Get S7 Can Opener?




S7 Can Opener is not a Siemens product, but a third-party product developed by HMS Industrial Networks. You can get it from their website or from other online sources. There are two versions of S7 Can Opener: a demo version and a registered version. The demo version only shows the blocks and their protection status, but does not modify them. The registered version is fully functional and requires a registration code that identifies the user.


Why Use S7 Can Opener?




S7 Can Opener is a useful tool for PLC SIEMENS S7-300/400 programmers who need to access their protected blocks and make changes to them. It can save time and money by avoiding the need to rewrite or recompile your blocks. It can also help you maintain just one copy of your blocks instead of having both compiled and source copies. Moreover, it can enable you to connect your SIMATIC S7-1200 to CANopen devices using an interface module called CM CANopen.


Conclusion




S7 Can Opener is a software program that can remove the protection from S7 blocks that are marked with the "know_how_protect" keyword. It works on S7 programs (*.s7p) and S7 libraries (*.s7l) and it can handle different block families (FBs, FCs, OBs, DBs). It can also toggle the protection status on-the-fly, without having to compile your blocks. To use it, you need to select the desired project or library, choose the blocks you want to modify, and click on the "Protect" or "Unprotect" buttons. You can get it from HMS Industrial Networks or other online sources. It is not a Siemens product, but a third-party product that can help you access your protected blocks and connect your SIMATIC S7-1200 to CANopen devices.


What are the Benefits of S7 Can Opener?




S7 Can Opener has many benefits for PLC SIEMENS S7-300/400 programmers and users. Some of them are:


  • It can help you recover your source code if you lose it or if your software supplier or system integrator does not support it anymore.



  • It can help you modify your blocks according to your needs and preferences, without having to compile them again.



  • It can help you save time and space by keeping just one copy of your blocks instead of having both compiled and source copies.



  • It can help you connect your SIMATIC S7-1200 to CANopen devices using an interface module called CM CANopen, which can expand the functionality and compatibility of your system.



  • It can help you troubleshoot and diagnose your blocks and network by showing you the protection status and the I/O data of each block.



What are the Limitations of S7 Can Opener?




S7 Can Opener is not a perfect tool, and it has some limitations that you should be aware of. Some of them are:


  • It cannot remove the protection from SFB and SFC blocks, which are system functions stored within the PLC system memory.



  • It cannot decrypt or decompile your blocks, which means that you cannot see or edit the logic inside them.



  • It cannot protect your blocks from being modified by others, which means that you should keep a backup copy of your original blocks in case someone changes them without your permission.



  • It cannot guarantee that your modified blocks will work as expected, which means that you should test them thoroughly before using them in your system.



  • It is not a Siemens product, but a third-party product developed by HMS Industrial Networks, which means that Siemens does not provide any support or warranty for it.



How to Get Started with S7 Can Opener?




If you want to try S7 Can Opener, you can download the demo version from the HMS Industrial Networks website or from other online sources. The demo version only shows the blocks and their protection status, but does not modify them. To use the full functionality of S7 Can Opener, you need to purchase the registered version and enter the registration code that identifies you as a user. You can also find more information and tutorials on how to use S7 Can Opener on the HMS Industrial Networks website or on other online platforms.


Conclusion




S7 Can Opener is a software program that can remove the protection from S7 blocks that are marked with the "know_how_protect" keyword. It works on S7 programs (*.s7p) and S7 libraries (*.s7l) and it can handle different block families (FBs, FCs, OBs, DBs). It can also toggle the protection status on-the-fly, without having to compile your blocks. To use it, you need to select the desired project or library, choose the blocks you want to modify, and click on the "Protect" or "Unprotect" buttons. You can get it from HMS Industrial Networks or other online sources. It is not a Siemens product, but a third-party product that can help you access your protected blocks and connect your SIMATIC S7-1200 to CANopen devices. However, it also has some limitations that you should be aware of, such as not being able to remove the protection from SFB and SFC blocks, not being able to decrypt or decompile your blocks, not being able to protect your blocks from being modified by others, not being able to guarantee that your modified blocks will work as expected, and not being supported or warranted by Siemens. Therefore, you should use S7 Can Opener with caution and responsibility, and always keep a backup copy of your original blocks in case something goes wrong. 6c859133af


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