Emergency Shutdown System

An overall description that online used in my company is made by the following five aspects:the constitution of ESD are introduced by the aspects redundancy structure of PES,the process of user-program function are introduced by the aspects of process cycle and the adoption of important functions,maintenance notes are suggested by the aspects of apparatus' maintenance、the start of control cabinet,the breakdown detection of ESD is introduced by the aspects of malfunctionof central devices、coprocessor and communication modules.