Originally a Russian-developed utility, the 2024/2025 releases (v4.5 to v5.0) have added support for Delta’s latest encryption.
Large-scale AH500 series PLCs, designed for complex automation systems, incorporate more sophisticated security measures. The AH500 operation manual indicates that restoring the PLC requires the password, and after restoration, project passwords and program IDs may be recoverable while PLC passwords and PLC IDs cannot be saved within the ISPSoft project. This suggests password recovery on AH500 devices is more involved than on smaller PLCs.
: Software is available for specific series, such as the DVP-SS2, ES2, or AH/AS series, allowing users to "read" or unlock passwords directly from the hardware. Key Software for Delta PLCs Key Feature ISPSoft Main Development IEC 61131-3 compliant project management. WPLSoft Programming Standard tool for DVP series development and monitoring. Delta PLC Password Tool Management Centralized vault for organizing project credentials. Read Password “DVP14SS2 /DVP28SS2” PLC Delta delta plc password unlock software new
: Platforms like PLC CNC Soft offer dedicated recovery services for forgotten project passwords by analyzing the encrypted files.
Keep detailed notes in your offline backups. This suggests password recovery on AH500 devices is
Identifies and locks specific logic blocks within the application.
Delta PLC Password Unlock Software New: Ultimate Recovery Guide WPLSoft Programming Standard tool for DVP series development
As I couldn't find specific reviews from verified sources, I recommend checking the official Delta Electronics website, online marketplaces, or forums for more information and user reviews.
The simplest method employed by unlock software is brute force password guessing. The tool systematically attempts every possible password combination until the correct one is found. This approach is effective for short numeric passwords but becomes computationally impractical for longer alphanumeric strings. As one forum user noted, a tool that successfully found a four-digit password in reasonable time failed to crack an eight-character alphanumeric password even after three days of continuous scanning.
Bypassing a password on a machine you do not own may violate intellectual property laws, software copyright protections, or vendor end-user license agreements (EULAs).
The search for is a symptom of a broken industrial handover process. While these tools are powerful—able to crack a DVP-ES2 password in seconds—they are a last resort.