1756-PA72/C    A-B 自动化控制模块

1756-PA72/C    A-B 自动化控制模块

对于小的系统，如80点以内的系统。一般不需要扩展，当系统较大时，就要扩展。不同公司的产品，对系统总点数及扩展模块的数量都有限制，当扩展仍不能满足要求时，可采用网络结构。有些厂家产品的个别指令不支持扩展模块，因此，在进行软件编制时要注意当采用温度等模拟模块时，各厂家也有一些规定，请看相关的技术手册。各公司的扩展模块种类很多，如单输入模块、单输出模块输入输出模块、温度模块、高速输入模块等。

PLC的网络设计

当用PLC进行网络设计时，其难度比PLC单机控制大得多 首先你应选用自己较熟悉的机型，对其基本指令和功能指令有较深入的了解，并且指令的执行速度和用户程序存储容量也应仔细了解。否则，不能适应你的实时要求，造成系统崩溃。另外，对通信接口、通信协议数据传送速度等也要考虑。最后，还要向PLC的商家寻求网络设计和软件技术支持及详细的技术资料，至于选用几层工作站，依你的系统大小而定。

适用于 Advant Master DCS 的 Advant Controller 160 支持和迁移适用于 Advant Master DCS 的 ABB Advant Controller 160，这是一个经过验证的燃气轮机、蒸汽轮机和水轮机涡轮机控制和保护系统。Advant Controller 160 的广泛参考案例包括由 Alstom 和前 ABB Stal（现为 Siemens Industrial Turbomachinery）交付的联合循环发电站。Advant Controller 160 提供强大的功能： 逻辑和顺序控制 监管控制 定位计算和过程优化 报警和事件记录 通过串行线路（如 Modbus、SERCOS 和 Siemens 3964R）与其他系统的开放接口 应用程序和工程访问的密码保护 可扩展冗余Advant Controller 160 提供多种功能，例如：由于准确的源头事件时间标记，支持事件序列。冗余：处理器模块、I/O 总线扩展、Advant 现场总线 100 和电源。完全集成在系统 800xA 中。最多 6 个处理器模块的多处理。范围广泛的中央 S600 和分布式 S800 I/O 模块提供了最大的配置可能性。建议的最大容量约为 1500 个 I/O 点。

1756-PA72/C    A-B 自动化控制模块

For small systems, such as systems below 80 o'clock. Generally, there is no need to expand, and when the system is large, it will be expanded. The products of different companies have restrictions on the total number of system points and the number of expansion modules. When the expansion still cannot meet the requirements, the network structure can be adopted. Some manufacturers' individual instructions do not support extended modules. Therefore, when compiling software, we should pay attention to the fact that when using temperature and other analog modules, various manufacturers also have some regulations. Please refer to the relevant technical manuals. There are many kinds of expansion modules in various companies, such as single-input module, single-output module, input-output module, temperature module, high-speed input module and so on.

Network design of PLC

When using PLC for network design, it is much more difficult than PLC stand-alone control. First of all, you should choose a familiar model, have a deeper understanding of its basic instructions and functional instructions, and also carefully understand the execution speed of instructions and the storage capacity of user programs. Otherwise, it can't meet your real-time requirements and cause the system to crash. In addition, the communication interface and data transmission speed of communication protocol should also be considered. Finally, you should also seek the network design, software technical support and detailed technical information from the PLC merchants. As for the choice of several layers of workstations, it depends on the size of your system.

Advant Controller 160 for Advant Master DCS supports and migrates ABB Advant Controller 160 for Advant Master DCS, which is a proven turbine control and protection system for gas turbines, steam turbines and water turbines. The extensive reference cases of Advant Controller 160 include combined cycle power stations delivered by Alstom and former ABB Stal (now Siemens Industrial Turbo Machinery). Advant Controller 160 provides powerful functions: logic and sequence control, supervision, control, positioning calculation and process optimization, alarm and event recording, open interface application with other systems through serial lines (such as Modbus, SERCOS and Siemens 3964R) and password protection for engineering access. Extensible redundant Advant Controller 160 provides multiple functions, such as supporting event sequence due to accurate time stamp of source events. Redundancy: processor module, I/O bus expansion, Advant field bus 100 and power supply. Fully integrated in the system 800xA. Multi-processing of up to 6 processor modules. A wide range of central S600 and distributed S800 I/O modules provide the greatest configuration possibilities. The recommended maximum capacity is about 1500 I/O points.

1756-PA72/C    A-B 自动化控制模块