ISPSoft is the current standard for Delta PLC programming. It provides integrated tools for security:
The safest way to regain access to a locked Delta PLC is through official channels or previously documented credentials. Standard Reset via Programming Software : Use official tools like delta plc password unlock software new
Use vendor support
If you need legitimate help regaining access to a Delta PLC you own or administer, here are lawful, safe steps you can follow: ISPSoft is the current standard for Delta PLC programming
Several third-party tools are designed to "read" the hex code from the PLC’s memory to reveal the stored password without wiping the program. PLC247 Tools here are lawful