厦门亿佳天辰贸易有限公司
第2年
第2年 
第2年
来源：厦门亿佳天辰贸易有限公司 时间：2024-05-18 05:23:07 [举报]
直流电源通讯1756-PBXTR
这些PLC的用户程序由主程序、子程序和中断程序组成。在每一个扫描循环周期，CPU都要调用一次主程序。主程序可以调用子程序，小型控制可以只有主程序。中断程序用于快速响应中断事件。在中断事件发生时，CPU将停止执行当时正在处理的程序或任务，去执行用户编写的中断程序。执行完中断程序后，继续执行被暂停执行的程序或任务。它们的子程序和中断程序没有局部变量，子程序没有输入、输出参数。西门子的S7-200的程序结构映像输入/输出（I/Q）、变量存储器V、内部存储器位M、定时器T、计数器C等属于全局变量。S7-200的程序组织单元(ProgramOrganizationalUnit，简称为POU)包括主程序、子程序和中断程序。每个POU均有自己的64字节局部变量，局部变量只能在它所在的POU中使用。与此相反，全局变量可以在各POU中使用。下面是子程序可以使用的局部变量：TEMP(临时变量)是暂时保存在局部数据区中的变量。只有在执行该POU时，定义的临时变量才被使用，POU执行完后，不再保存临时变量的数值。2)IN是由调用它的POU提供的输入参数。
OUT是返回给调用它的POU的输出参数(子程序的执行结果)。IN_OUT是输入_输出参数，其初始值由调用它的POU传送给子程序，并用同一变量将子程序的执行结果返回给调用它的POU。主程序和中断程序的局部变量中只有临时变量TEMP。
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MDME152S1G-Panasonic AC Servo Motor 9
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MR-E-100A-KH003-Mitsubishi Servo Driver 94
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MR-E-40A-KH003-Mitsubishi Servo Driver 8
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MR-H200BN-Mitsubishi Servo Driver 87
MR-H200BN-Mitsubishi Servo Driver 87
MR-J2-100C-Mitsubishi Servo Driver 98
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MR-J2S-40B-EE085-Mitsubishi Servo Driver 8
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MR-J2S-40B-T004-Mitsubishi Servo Driver 95
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MR-J2S-60B-FG168-Mitsubishi Servo Driver 8
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标签：1756-PBXTR
