CAJ | 학술논문

针对传统的PLC编程方式在解决复杂控制问题时存在的缺陷，采用一种将形式化和信号解释Petri网(SIPN)应用于PLC程序设计的方法。通过一个机器人焊接单元的例子来说明这一设计过程，首先建立系统控制算法的信号解释Petri网模型，验证其是否满足基本Petri网的安全性、活性和可逆性的特征，然后利用模型检测工具Cadence SMV对系统模型进行验证和确认(V&V)，检验其是否满足SIPN的确定性、终止性和输出正确性，从而避免了控制算法的设计过程中可能出现的并发、冲突和死锁等事件，由此设计出具有更高的正确性和可靠度的PLC程序。
침대전통적PLC편정방식재해결복잡공제문제시존재적결함，채용일충장형식화화신호해석Petri망(SIPN)응용우PLC정서설계적방법。통과일개궤기인한접단원적례자래설명저일설계과정，수선건립계통공제산법적신호해석Petri망모형，험증기시부만족기본Petri망적안전성、활성화가역성적특정，연후이용모형검측공구Cadence SMV대계통모형진행험증화학인(V&V)，검험기시부만족SIPN적학정성、종지성화수출정학성，종이피면료공제산법적설계과정중가능출현적병발、충돌화사쇄등사건，유차설계출구유경고적정학성화가고도적PLC정서。
To overcome the defects in traditional PLC programming, an approach combined formal methods with Signal Interpreted Petri Net (SIPN) is presented. An example of robot welding unit is used to illustrate this process. This paper builds a model of the control algorithm with Signal Interpreted Petri Net first, and verifies whether it satisfies the safety, liveness and reversibility characteristics of basic Petri net. Then it uses the model checking tool Cadence SMV for model verification and validation, to test whether it meets the properties of certainty, termination and output correctness. Thus the possible events like concurrency, conflict and deadlock in control algorithm designing process can be avoided and correct and dependable PLC programs are designed.