Time division multiplexing MODBUS TCP data transmission method

The invention discloses a time division multiplexing MODBUS TCP data transmission method. The method comprises the following steps: integrating a cabin local monitoring alarm and a control console remote monitoring alarm in a cabin monitoring alarm system; a ship power management system and an engine room monitoring alarm system are integrated by adopting a star-shaped network topology structure, and an engine room local monitoring alarm, a control console remote monitoring alarm, a first battery management system and a second battery management system are all connected with the ship power management system; the method comprises the following steps of: dividing a storage memory related to data of a battery management system in a ship power management system into six areas for respectively storing different periodic data and non-periodic data, and periodically updating or non-periodically updating the different periodic data and non-periodic data; and when the ship power management system sends a data request