GE VG5SK8I052311 PM0N2000 控制模块
采用新的先进的微处理器和电子技术达到快速的扫描时间;·小型的、低成本的PLC，可以代替四到十个继电器;
·高密度的I/O系统，以低成本提供了节省空间的接口;
·基于微处理器的智能I/O接口扩展了分布式控制能力，典型的接口如PID，网络，CAN总线，现场总线，ASCII通信，定位，主机通讯模块和语言模块（如BASIC，PASCALC）等;
·包括输入输出模块和端子的结构设计改进，使端子更加集成；
·GE VG5SK8I052311 PM0N2000 控制模块特殊接口允许某些器件可以直接接到控制器上，如热电偶、热电阻、应力测量、快速响应脉冲等；
·外部设备改进了操作员界面技术，系统文档功能成为了PLC的标准功能。
以上这些硬件的改进，导致了PLC的产品系列的丰富和发展，使PLC从最小的只有10个I/O点的微型PLC，到可以达到8000点的大型PLC，应有尽有。这些产品系列，用普通的I/O系统和编程外部设备，可以组成局域网，并与办公网络相连。整个PLC的产品系列概念对于用户来说，是一个非常节约成本的控制系统概念。
GE VG5SK8I052311 PM0N2000 控制模块与硬件的发展相似，PLC的软件也取得了巨大的进展，大大强化了PLC的功能:
·PLC引入了面向对象的编程工具，并且根据国际电工委员会的IEC61131-3的标准形成了多种语言;
· 小型PLC也提供了强大的编程指令，并且因此延伸了应用领域;
·高级语言，如BASIC，C在某些控制器模块中已经可以实现，在与外部通讯和处理数据时提供了更大的编程灵活性;
·梯形图逻辑中可以实现高级的功能块指令，可以使用户用简单的编程方法实现复杂的软件功能;
·诊断和错误检测功能从简单的系统控制器的故障诊断扩大到对所控制的机器和设备的过程和设备诊断;
·浮点算术可以进行控制应用中计量、平衡和统计等所牵涉的复杂计算;
·数据处理指令得到简化和改进, 可以进行涉及大量数据存储、跟踪和存取的复杂控制和数据采集和处理功能。
GE VG5SK8I052311 PM0N2000 控制模块
Using new advanced microprocessors and electronic technology to achieve fast scan times; Small, low-cost PLCS that can replace four to ten relays;
· High-density I/O systems provide space-saving interfaces at low cost;
· Intelligent I/O interfaces based on microprocessors extend distributed control capabilities, typical interfaces such as PID, network, CAN bus, fieldbus, ASCII communication, positioning, host communication modules and language modules (such as BASIC, PASCALC);
· Including structural design improvements of input and output modules and terminals to make terminals more integrated;
·GE VG5SK8I052311 PM0N2000 control module special interface allows some devices to be directly connected to the controller, such as thermocouples, thermal resistance, stress measurement, fast response pulse, etc.
· The external equipment has improved the operator interface technology, and the system documentation function has become a standard function of the PLC.
These hardware improvements have led to the enrichment and development of the PLC product series, making the PLC from the smallest micro-PLC with only 10 I/O points to the large PLC that can reach 8000 points. These product families, with common I/O systems and programming peripherals, can form local area networks and connect to office networks. The whole PLC product family concept is a very cost-saving control system concept for users.
GE VG5SK8I052311 PM0N2000 control module and hardware development is similar, PLC software has also made great progress, greatly strengthening the function of PLC:
PLC introduced object-oriented programming tools, and according to the International Electrotechnical Commission IEC61131-3 standard formed a variety of languages;
· Small PLCS also provide powerful programming instructions, and thus extend the application field;
High-level languages, such as BASIC, C are already available in some controller modules, providing greater programming flexibility when communicating with the outside world and processing data;
· Ladder diagram logic can achieve advanced function block instructions, allowing users to use simple programming methods to achieve complex software functions;
The diagnostic and error detection functions are expanded from simple fault diagnosis of system controllers to process and device diagnosis of machines and equipment under control;
Floating-point arithmetic can perform complex calculations involved in measurement, balancing and statistics in control applications;
Data processing instructions are simplified and improved to enable complex control and data acquisition and processing functions involving storage, tracking and access to large amounts of data.
GE VG5SK8I052311 PM0N2000 控制模块
