Always document the password inside the PLC code comment or on a physical sticker inside the electrical cabinet cover (not on the HMI bezel). For critical machines, set the engineering password to a standard known by your maintenance team (e.g., M@int2025 ) rather than a random string.
But what happens when you forget the password? Or when a legacy machine arrives without documentation? Or when you need to implement a complex, multi-level user hierarchy? Understanding the system is not just about security; it’s about operational continuity. mcgs hmi password
Introduction: The Silent Guardian of Your Automation System Always document the password inside the PLC code