# How to unlock protected function block in Siemens S7 PLC - SIMATIC MANAGER **URL:** \ **Category:** Siemens\ **Created:** [April 9, 2016, 1:27am UTC](https://forumautomation.com/t/how-to-unlock-protected-function-block-in-siemens-s7-plc-simatic-manager/972 "2016-04-09T01:27:45Z")\ **Posts on this page:** 1\ **Page:** 1
**Author:** ![denizen](https://forumautomation.com/letter_avatar_proxy/v4/letter/d/848f3c/32.png) [@denizen](https://forumautomation.com/u/denizen)\ **Post date:** [April 9, 2016, 1:27am UTC](https://forumautomation.com/t/how-to-unlock-protected-function-block-in-siemens-s7-plc-simatic-manager/972/1 "2016-04-09T01:27:45Z")
Microsoft Access is used for remove the password protection of function blocks used in SIMATIC MANAGER Siemens S7 plc. Step by Step Procedure ![Password protected function block - Siemens PLC](https://cdn.forumautomation.com/original/1X/33108a2f1aab465b5ee5733a470096715bc92907.jpg) In the above picture you can see the function block is protected.You cannot open a protected function block. 1.Open Microsoft Access . Open the DBF file from the location you saved the PLC project . Browse to following folder to open the DBF file In the Project file \> ombstx\>offline \> 00000001 ![Password removal of Siemens function block - Open DBF File in Acess](https://cdn.forumautomation.com/original/1X/49edb9341287b5a90e50ad5cb11ac8c02906c94f.jpg) 2.Select the DBF file and open it. There may be more than one DBF file .Open the DBF file and check “Password” column is present or not . ![Siemens Function block password removal](https://cdn.forumautomation.com/original/1X/f34dfeccf40a163cb32ed3dd0b0b63e5d001c529.jpg) The value “0” in password filed means function block is not protected. The value “3” in password filed means function block is protected. Change the value from 3 to 0 for removing the password protection. Now save the “DBF” file. You can see the protection is removed .