描述
用户程序存储器的容量
合理确定PLC的用户程序存储器的容量，是PLC应用设计及选型中不可缺少的环节。一般说来，用户程序存储器的内存容量与内存利用率、开关量Ｉ／Ｏ总数、模拟量Ｉ／Ｏ点数及设计者的编程水平有关。
简单的估算公式：
内存字数＝(开关量Ｉ／Ｏ总点数＋模拟量Ｉ／Ｏ点数 X 16) X 10
式中：每个模拟量通道(或Ｉ／Ｏ点)相当16个开关量Ｉ／Ｏ点。在此基础上，可考虑留有20～25％的裕量。对于工艺比较复杂的系统，应适当增加存储器的容量，否则，当控制较复杂、数据处理量大时，可能出现存储器容量不够的问题。
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主营：世界知名品牌的PLC、DCS系统备件模块
①Allen-Bradley(美国AB)系列产品》
②Schneider(施耐德电气)系列产品》
③General electric(通用电气)系列产品》
④Westinghouse（美国西屋）系列产品》
⑤SIEMENS(西门子系列产品)》
⑥销售ABB Robots.FANUC Robots、YASKAWA Robots、KUKA Robots、Mitsubishi Robots、OTC Robots、PanasonicRobots、MOTOMAN Robots。
⑦estinghouse（西屋）：OVATION系统、WDPF系统、MAX1000系统备件。
⑧Invensys Foxboro（福克斯波罗）：I/A Series系统，FBM（现场输入/输出模块）
顺序控制、梯形逻辑控制、事故追忆处理、数模转换、输入/输出信号处理、数
据通信及处理等。Invensys Triconex:冗余容错控制系统、基于三重模件冗余（TMR）
结构的zui现代化的容错控制器。
⑨Siemens(西门子)：Siemens MOORE，Siemens Simatic C1，Siemens数控系统等。
⑩Bosch Rexroth（博世力士乐）：Indramat，I/O模块,PLC控制器,驱动模块等。
◆Motorola（摩托罗拉）：MVME 162、MVME 167、MVME1772、MVME177等系列。
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