子程序塊(僅對系列90-30 PLC)當(dāng)程序運(yùn)行時,可調(diào)用子程序塊,在使用CALL指令調(diào)用子程序之前,該子程序必須通過程序塊說明編輯器加以說明。在一個程序模塊中最多有64個子程序塊說明。該程序中每-邏輯程序塊最多允許使用64個CALL指令,子程序模塊最大為16K字節(jié)或3000回路。但主程序和全部子程序均需滿足CPU型號對邏輯字節(jié)數(shù)的限制(對子程序邏輯程序塊尺寸的

 

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