Abstract
Paper in view of the dense medium coal preparation process control, carefully study the density of heavy medium coal preparation control system of the internal structure, main characteristics, control laws and the design method. Open field bus control structure is adopted in the system, Siemens S7-300 programmable controller is responsible for control, executing agencies responsible for enforcing the orders of the PLC to control the related parameters. Through the practice, this control system is powerful, easy to operate, reliable performance, has certain theoretical significance and practical application value.
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