No password, no matter how complex, can protect an HMI if an attacker is on the same Layer 2 network. Use VLANs or a firewall to restrict:
The default password for Delta HMI is crucial because it serves as the first line of defense against unauthorized access. If the default password is not changed or reset, it can be easily exploited by malicious users, potentially leading to data breaches, process disruptions, or even physical harm to personnel and equipment. delta hmi default password
Treat every 111111 as a red flag. Audit your HMIs this week. Check the upload password. Review your network rules. Because the next person to type 111111 into your HMI might not be a tired engineer on a deadline. It might be an adversary with a Shodan search and a copy of DOPSoft. No password, no matter how complex, can protect
If you are trying to access the internal system menu on the HMI hardware itself (often by long-pressing a corner or using a physical button during boot), the password remains the same unless modified in the software's "System Key Password" field. Welcome to Delta Security Levels & Configuration Treat every 111111 as a red flag
Some specialized Delta HMIs (e.g., for food & drug industries) use hardware keys. Default passwords still apply for the system menu, but runtime access may require the physical key.