One post from a Vietnamese website offers "Phần mềm đọc pass PLC Delta" (Delta PLC Password Reading Software) for the DVP series, linking to a Google Drive file.
Ensure you have the USB-ACAB230 or similar communication cable to connect your PC to the PLC (usually RS232 or RS485). delta plc password unlock software link
Several tools have been developed by the automation community to read or unlock Delta PLCs. One post from a Vietnamese website offers "Phần
Delta PLCs come with a built-in password protection mechanism to prevent unauthorized access to the device and its programming. The password is used to secure the PLC's program, ensuring that only authorized personnel can modify or view the code. However, if the password is lost or forgotten, it can lead to significant downtime and increased maintenance costs. Delta PLCs come with a built-in password protection
claim to sell or provide "Read Password" services for models like the DVP-SS2, , and EX series Reported Pricing : Prices for these "services" typically range from $50.00 to $120.00 Functionality Claims
If you are the owner and have a genuine, business-critical need to recover the program (e.g., after a supplier went bankrupt and took the password), contact and be prepared to provide proof of ownership. There may be formal channels for this. The risks of downloading random executables from the internet far outweigh the benefits, as you risk infecting your industrial control network with malware or destroying the PLC itself.
Delta Electronics builds robust security features into its dynamic lines of PLCs, including the DVP, AS, and AH series. These security layers protect proprietary code, machine logic, and industrial processes from unauthorized tampering.