Simatic S7 Can Opener V1.31 33 [new] -
: Select the specific compiled block (e.g., FC101 or FB50 ) and choose to strip the protection flag. The tool modifies the internal index marker that tells SIMATIC Manager to lock out the code view.
Version 1.31 is an older release; the tool has since been updated to version 2.0. Early versions like 1.10 were the initial commercial releases, while later iterations added features like support for User Data Types (UDTs). Simatic S7 Can Opener V1.31 33 - 15.152.32.195
To simplify project management by keeping only one copy of blocks rather than separate protected and source versions.
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Standard software diagnostic operations cannot penetrate the block boundary without the original database sources. Simatic S7 Can Opener V1.31 33
While it serves as a critical recovery tool for industrial automation engineers handling legacy systems, using it carries notable technical, operational, and legal responsibilities. What is the "KNOW_HOW_PROTECT" Restriction?
Modern TIA Portal applications use advanced cryptographic security models. Practical Applications for Control Engineers 1. Legacy Hardware Maintenance
The "Can Opener" is particularly useful in industrial scenarios where:
: Without the original source file (.AWL, .SCL, or .CFC), an engineer uploading the block from a live PLC or opening it from a backup file cannot view the internal Statement List (STL) or Ladder Logic (LAD) code. : Select the specific compiled block (e
A: Yes, if the original block contained comments and symbolic information, this metadata should remain intact after removing protection.
A: Consult your original purchase agreement and applicable laws. Many contracts include source code escrow provisions. Legal counsel should be involved before attempting to bypass any protection mechanisms.
Generally, SIMATIC S7 devices are used in industrial automation for controlling and monitoring processes. Programming these devices typically involves using software like TIA Portal (Totally Integrated Automation Portal) by Siemens.
It is important to clarify upfront: is not an official Siemens software product. Rather, it is a well-known, unofficial tool in industrial automation circles—a legacy piece of software (often associated with older versions like 1.31 and a common placeholder “33”) used for cracking or bypassing access protections on Siemens S7 Programmable Logic Controllers (PLCs). Early versions like 1
: It cannot bypass an online hardware-level PLC security password. If a physical CPU requires a password for online access, Upload/Download procedures, or diagnostic observation, the S7 Can Opener is completely ineffective.
: Navigate to the "Open" menu, browse to the directory of your Siemens project, and select the project file. The tool parses the project database and displays a clean list of all block folders found inside.
: A machine vendor or system integrator has gone out of business, leaving a factory with an obscured software bug and no technical support pathway.
– Instead of maintaining both compiled and source copies of each block (which can lead to version drift), you can keep just one copy and toggle the KNOW_HOW_PROTECT flag on the fly without recompiling.