Unlock POU Password S7-200 Use Step7 MicroWIN V4.0

The control program for an S7-200 CPU consists of the following types of Program Organizational Unit (POU): Main program, Subroutines, Interrupt routines. In this post, I guide you: How to set and unlock POU password S7-200 use Step7 MicroWin V4.0 Software.

Table of Contents

Setup a POU Password

Step 1: Use the Step7 MicroWIN V4.0 program open the project. Right-click on a POU > Properties… > Protection tab
Step 2: Tick on “Password Protect this POU” box
Step 3: Type the characters to “Password” and “Verify” (These values are the same)
Step 4: Click “OK”. Close and save the project to apply the password.

Note:

When you right-click on “MAIN” POU, you will see an option: “Password-protect All POUs using this password”. If you tick on this box, your password applicate to all POUs, the POUs already a password will be using the old password.

How to Unlock POU Password S7-200

Why do it

To see code, edit the program…
Some programs write by you: Maybe forgot the password…
The program writes by other people: You can not contact the programmer.
We do not encourage it if you can contact the programmer.

Step by step

Step 1: Check Step 7 MicroWIN V4.0 Version on your computer. This tool only supports the version V4.0 Service pack 8 (SP8) or Service pack 9 (SP9)
Step 2: Download the tool at the end of the post.
Step 3: Open the path: “C:\Program Files\Siemens\STEP 7-MicroWIN V4.0\bin”. Rename file “datamanagers200.dll” to “datamanagers200-backup.dll”
Step 4: Extract the downloaded file. Coppy file “datamanagers200.dll” to C:\Program Files\Siemens\STEP 7-MicroWIN V4.0\bin
Step 5: Open the project you need unlock POU password S7-200. Enjoy it!

Note:

Close the Step7 MicroWIN program before begin.
With the tool, you unlock only, but you do not know the password of POUs. To show the password for S7-200 Project, POUs please try our service.