This may help. I'm not the expert, I only know what Google tells me :-)

http://www.automation-talk.info/2010/11/how-to-remove-omron-plc-password.ht=
ml


On Tue, Jun 13, 2017 at 12:53 PM, Carlos Marcano <c.marcano@gmail.com>
wrote:

> Hi List.
>
> I have inherited a mess of a job in which, among other things, I need to
> reprogram an Omron CJ1M CPU11 PLC. The problem being that the previous
> contractor left the job midway and password protected the PLC so even
> though I can get online with the PC software (CX-Programmer), I can't
> reprogram it or even initilize the memory area because it fails with a
> "Can't initialize the memory area" error.
>
> I was thinking if there is an option I'm missing for factory resetting th=
e
> PLC; I have no interest in the program already in it, just want to be abl=
e
> to use it with my own thing.
>
> Thanks in advance for any ponters.
>
> Regards,
>
> Carlos.
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