Hierarchical Permission Management and Operation Interlock
A three-level permission control system is implemented: operator (manual operation only), technician (mold parameter configuration), and administrator (system parameter modification). Different permissions correspond to different operating ranges. During mold changes, only users with technician permissions or higher can switch to "mold change mode."
"Mode mutual exclusion logic" is implemented at the program level: When the system is in "mold change mode," commands that could trigger the robot arm, such as "automatic production" and "continuous operation," are automatically blocked, and the robot arm's speed is limited to 20% of the rated speed (with manual fine-tuning).
Fail-Safe Design
Key sensors (such as the emergency stop button and safety door switch) utilize a dual-channel redundant design. Any signal anomaly (such as a disconnection or short circuit) in any channel immediately triggers a system shutdown and indicates the fault location through an audible and visual alarm (red warning light + buzzer).
The control system is powered by an uninterruptible power supply (UPS), ensuring that the robot arm maintains its current position in the event of a power outage, rather than a free fall. The system also saves the current mold change progress data to prevent malfunctions after power is restored.
