Recently I'd been called by Hindalco's Fabrication Plant division to unlock the protected blocks in Siemens SIMATIC Step 7. They were in need to unlock those blocks since an year because of 1 million Rupees of loss per month.

They want to re-program those blocks but it was locked by the man who'd done the setup. From the people working in that department, I came to know that they were trying to call that man (someone from Italy) right here but he's not coming.

Even the basic version of SIMATIC STEP 7 gives you easy access to the full potential of Siemens’ controllers. STEP 7 Professional opens even more possibilities.

Actually, what he'd done was that he'd locked some of the blocks and deleted the source file. And Siemens didn't provide any feature to unlock. Department people also told me that even the people working in Siemens don't know how to do it. Being a software engineer I know that any thing can be reverse engineered. So I took up the challenge.

How did I unlocked the blocks? The first thing I'd done was searched about this software at Google and read about what is this software all about. After that I'd explored the software.

You can benefit from the opportunities of the Internet for automation software too. The license keys, from the Online Software Delivery. SIMATIC STEP7 Safety. Step7 Project (program) password protection. It is not part of Step 7 & come as an additional software. Happy to hear this - STEP 7 MicroWIN V4.0 SP8 and SP9 - Available for DownloadDidn't expect that this will happen this soon.

A person (might be S7 programmer) told me about 'Generate source' and shown me a sample by doing it. Further on he'd shown me how do they lock a block via KNOW_HOW_PROTECT. Download Aaoifi Shariah Standards Pdf Software. It was amazing, they just write this line ( KNOW_HOW_PROTECT) inside a program after begin statement and compile the code.

The compiled code is known as blocks. Whistler 1740 Radar Detector Manual on this page. The blocks are now protected which means the code inside the block can't be seen by other. Then delete the source and your blocks are now protected. Now my objective was to unlock those blocks. So I'd followed the steps given below to unlock those blocks, Step 1: Download *.dbf file editor.