I’m seeking help from fellow sailors. I’ve only been working with instruments for a short time, so I don’t have a deep understanding of logic diagrams and don’t know how to draw them. It’s urgent! Waiting online!

Thread Content

Logic 1: The tank area is equipped with 12 toxic gas detectors (A~L). Once any of these detectors detects toxic gas at levels above the allowable limit, the SIS system issues a command to start closing the roll-up doors, as well as to activate the emergency fans and emergency absorption systems. Logic 2: When a large-scale leak occurs, any one of the groups AB/CD/EF triggers an alarm (both A and B detect the leak). The SIS system determines the tank involved in the incident based on the sequence in which the toxic gas alarms are detected, and then initiates the automatic transfer procedure. It opens the discharge valves at the bottom of the affected tank (XV-1902A~C), allowing the hydrogen fluoride liquid to flow into the emergency tank. Once the liquid level in the affected tank drops to zero, these discharge valves are closed, and all the hydrogen fluoride contained in that tank is transferred to the emergency tank. In Logic 2, among the three groups, only one group is considered priority; it is not possible for two groups to trigger an alarm at the same time.