The Study & Appliance Of CAN Field-bus Control System Based On Software Reuse

SHCAN2000 field-bus control system based on software reuse is discussed and studied in this paper, and farther more a set of control software for L LDPE-CAT production .according to SHCAN2000 system is also presented as an application sample, which is pratically working excellently and efficiently in a chamical plant now.Software reuse in industrial control system is a newly born research focus.Past experiences have shown that the industrial control software has to be developed in a very original and boring pattern, in which everything had to be started from programming activities.Now this anguishing procedure must be subdued according to industrial developement and economic struggle, which demand efficiency and capability.Aiming at efficient software developing way , this paper suggests software reuse to avoid duplicated and unnecessary work.Module "plug&play" , SHCAN2000 system combined reuse technology is presented as an ideal developing base for industrial control system.In SHCAN2000, after control analysing, the function modules can be properly assembled to form the core of the control system instead of programming.Those function modules form module storehouse, Which can be enriched by produceing new modules.A sample is given to illuminate design procedure, and to enhance SHCAN2000 system.New control methods are also suggested here. First, a new PID pressure step control method so-called "Zero OP Oversighf'which is highly accurate and low cost;Second, logical control method for producing procedure;Third, large control network for monitoring and management.All the methods have been tested to be pratically useful, stable and efficient.