| In this paper, a computer control system which is applied to transferring ash in zhang jiagang power station is designed and analyzed based on the project background. The system is consist of DCS and PLC which can achieve processing automation and information management automation,, During my writing this paper, the following work has been done:(1) Introduced the present situation and discussed the total plan and designation of the control system,,(2) Discussed the communication of PC and PLC, PLC and other DCS .(3) Applied the theory of sequential control to the PLC program(4) In this paper, analyzed and discussed how to set up ash outfunction block and arbitration function block with the condition provided by step7, and based on new program methods.(5) Introduced the design and function of the master-control interfaces... |
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