Unlocking the password of an Omron C200H PLC is a task that may become necessary in certain situations. The methods discussed in this blog post provide potential solutions for regaining access to a password-protected PLC. However, it is important to note that attempting to unlock a PLC without proper authorization is unethical and may violate security protocols. Therefore, it is recommended to seek assistance from qualified personnel or the original programmer when dealing with password-protected Omron C200H PLCs.
1) First go to plcunlockbd.com and Download PLC HMI password unlock v4.2 ( Link in the Description )
3) Select Your PLC Model
Go to Select PLC Type > OMRON > C200H Series
Like the picture below
Select your correct COM port in my case (COM1)
Click DECRYPTION then you will see your password in the password Section.