Removing Password On S7-1200

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  • #2932
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      Rank: Padawan

      How to unlock/format S7 1200 Password protected plc


        Hi PK and welcome to the forums. I’ve done a little digging on what you’re asking and I’ve found something that may help you out. Please be advised that I have not tried this so please attempt at your own risk!

        The steps I’ve found online will erase memory and remove the password – so you would be well advised to perform a full backup of the program – again attempt at own risk:

        1. Create empty transfer card (24MB MMC)

        2. Turn on CPU power supply

        3. Insert MMC card

        4. Wait until third LED from RUN starts blinking

        5. Turn off and turn on power supply

        That’s it. Let us know if this works for you.


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