The application of PLC in the metro system involves the following aspects:
1) Train control system: PLC is used for automatic control and operation management of subway trains. It can control the start, stop, acceleration, deceleration and braking of the train to ensure that the train runs smoothly within a safe range.
2) Signaling system: PLC plays an important role in the subway signaling system. It can control equipment such as signal lights, switches, track circuits, etc., to ensure the safe operation of trains between different track sections and avoid collisions and collisions.
3) Rail power supply system: The rail power supply system of the subway is usually controlled by PLC. The PLC can monitor and control the power supply equipment to ensure that the train receives a stable amount of power**, and to achieve power distribution and regulation for different sections.
4) Safety and emergency system: PLC is used for the safety and emergency treatment of the metro system. It can control equipment such as emergency braking devices, fire alarm systems, emergency evacuation indicators, etc., to respond to emergencies and ensure passenger safety.
5) Station control system: PLC can be used for the control and management of subway stations. It can control the operation of automatic doors, elevators, escalators and other equipment in the station, and monitor the best quantity and safety status of the platform.
6) Communication and network system: PLC plays an important role in subway communication and network system. It can control and manage communication equipment, network equipment, etc., to ensure the normal communication and data transmission of the subway system.
7) Data collection and monitoring: PLC can collect and monitor various data in the subway system, such as train location, speed, station volume, etc. This data can be used for operational monitoring, troubleshooting, and performance optimization.