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How to use the camera of Hikvision TV, such as how to communicate with Mitsubishi plc about people flow?

This problem: it is actually a communication protocol. The communication protocol supported by Mitsubishi plc is Rs232(com), while network cameras generally support ip communication and Rs485. If you want to convert RS485 to Rs232, you can use an adapter, which is a bit complicated. You can call the after-sales service to ask if RS232 can communicate with the network, and I can give you a feasible scheme after-sales.