PLC collects external signals and output correspond control commands after calculation to ensure the system operates in a required mode, additionally sends the collected information after processing to each HMI for display. It is the control center of the whole system. Each HMI receives and displays relevant data and transfer the requirement of the operator to the system for processing.In addition, the cooling system and the die casting system are provided with data base management function to store and load data and inform PLC to receive the unitedly compiled process parameter. The alarm information of the system is managed by the die casting system unitedly.
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