This scheme is based on the process control system (DCS) made by the HZDC-DCS system platform, which is designed to monitor the process control requirements of the whole production line. This system is developed based on SIEMENS platform, adopts S7-1500 series controller, ET200SP series remote module, the upper system and controller adopt EtherNet communication, the lower system adopts EtherNet communication, the DCS communication of pulp and paper machine in this system adopts optical fiber communication. Fiber communication is adopted in pulping and shredding workshops.