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Reset to factory settings - remove password

Created by: mikcomi at: 2/14/2016 9:39 PM (22 Replies)

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Thanks 7

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23 Entries

Entries per page: 10 | 20 | all

4/3/2018 3:08 PM	Rate (0)
Hati Platinum Member Joined: 9/21/2012 Last visit: 12/26/2025 Posts: 4829 Rating: (512)	Masoodes mikcomi Hi, i have successfully erase CPU memory and remove password. The steps are: 1. Create empty transfer card (24MB MMC) 2. Turno 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. Best regards Hi Should I use a 24MB MMC only? Not done with 4MB? The size shouldn't matter for this operation.

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4/21/2019 12:13 PM	Rate (0)
Esi_Sol Posts: 2 Rating: (0)	Thanks, I did it. The password is removed easily.
Esi_Sol Posts: 2 Rating: (0)
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12/26/2019 5:06 AM
vicky bhau Posts: 114 Rating: (2)	I Have Done it with 4 MB mmc.Do Not Bother About mmc Size.
vicky bhau Posts: 114 Rating: (2)
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1/27/2020 9:53 AM	Rate (0)
slimchance037 Posts: 5 Rating: (0)	Hi, Will it have the same firmware after that? Thanks
slimchance037 Posts: 5 Rating: (0)
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11/7/2020 5:59 PM	Rate (1)
Aslaan Experienced Member Joined: 7/11/2009 Last visit: 9/26/2025 Posts: 55 Rating: (2)	If you have lost the password for a password-protected CPU, use an empty transfer MCard to delete the password-protected program. Use one of Memory cards below 6ES7954-8LC02-0AA0(4 MB) 6ES7954-8LE02-0AA0(12 MB) 6ES7954-8LF02-0AA0(24 MB) 6ES7954-8LL02-0AA0(256 MB) *6ES7954-8LP01-0AA0(32 GB) After you receive new Mcard turn-off CPU, extract old Mcard and insert new Mcard in card slot, turn-on CPU and wait till Mcard will move all program data from cpu. For erasing the old Mcard you have to insert on a laptop. Delete all files on it, except of the two hidden marked system files "__LOG__" and "crdinfo.bin" . Remove this card from your laptop and insert it again in your s7-1200 cpu. Power-on and download your new program again in cpu s7-1200. Do not upload a password-protected program with an empty password! Other way is to Reset the CPU to factory defaults without a plugged MCard in CPU. Select Accessible devices >> Select PLC>> Online Diagonostic>> Functions> Reset to Factory Settings but not work to all CPU(depend on firmware). good luck! Remember!!!! Once you did this operation the old program from CPU is lost. You can now reload other program with known password or without.

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7/14/2022 9:08 PM	Rate (0)
Walter Jacquet Advanced Member Joined: 4/26/2017 Last visit: 10/13/2025 Posts: 78 Rating: (1)	hi there. I have done this step to delete the S7 1200c AC/DC/RLY 212-1BE31-0XB0 protected with password. I have a 4mb SIMATIC memory card 4MB 6S7954-9LC01-0AA0. The only problem is, when its done, i have this problem in diagnosis. When i try to use this PLC it shows "incompatibilty" is there something wrong with this?

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7/14/2022 9:29 PM	Rate (0)
Walter Jacquet Advanced Member Joined: 4/26/2017 Last visit: 10/13/2025 Posts: 78 Rating: (1)	Walter Jacquet hi there. I have done this step to delete the S7 1200c AC/DC/RLY 212-1BE31-0XB0 protected with password. I have a 4mb SIMATIC memory card 4MB 6S7954-9LC01-0AA0. The only problem is, when its done, i have this problem in diagnosis. When i try to use this PLC it shows "incompatibilty" is there something wrong with this? it turns out my laptop its not in the same ip adress. So i forced my PC to use 192.168.0.100 so i finally manage upload my program.

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This contribution was helpful to 1 thankful Users Jen_Moderator

3/22/2023 10:47 AM	Rate (0)
JohnRadem Member Joined: 6/13/2022 Last visit: 4/1/2025 Posts: 1 Rating: (0)	With a 4 MB MMC it does not seem to be that easy, because resetting password doesn't seem to work.

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3/22/2023 10:58 AM	Rate (0)
sancruz Gold Member Joined: 3/11/2019 Last visit: 12/9/2025 Posts: 1653 Rating: (322)	Hi JohnRadem, JohnRadem With a 4 MB MMC it does not seem to be that easy, because resetting password doesn't seem to work. If it is really an MMC (Micro Memory Card) ist is not possible, as these cards are for S7-300 e.g. For S7-1200 an SMC (SIMATIC Memory Card) is necessary. And if such card is used, it is possible if it was done like described in S7-1200 system manual (also with 4MB). regards sancruz
	Feedback appreciated, please rate
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5/16/2023 8:57 AM	Rate (0)
Tom B. Posts: 21 Rating: (2)	I tried to reset folowing CPU with a 12 BM card: CPU 1214FC DC/DC/DC 6ES7 214-1AF40-0XB0 FW V 4.5.1 TIA Portal v18 I tried a transfer card with a new program and an empty card. It allways ends up with not deleted password for "Full access incl. fail-safe". Using the empty card the program is deleted but I am unable to download or transfer the new one. This is still only possible with knowledge of the original password (luckily I have that). All that remains is to add that the "Protection of confidential PLC configuration data" has been activated.in the original project. How to really reset a CPU without knowledge of the password?
Tom B. Posts: 21 Rating: (2)	Last edited by: Tom B. at: 05/16/2023 08:58:23
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