PPD113B01-10-150000 RF522 ABB 模块 控制器

PPD113B01-10-150000 RF522 ABB 模块 控制器

PPD113B01-10-150000 RF522 ABB 模块 控制器意味着通过它可以按照所希望的方式保持和改变机器、机构或其他设备内任何感兴趣或可变的量。控制系统同时是为了使被控制对象达到预定的理想状态而实施的。控制系统使被控制对象趋于某种需要的稳定状态。

PPD113B01-10-150000 RF522 ABB 模块 控制器已被广泛应用于人类社会的各个领域。在工业方面，对于冶金、化工、机械制造等生产过程中遇到的各种物理量，包括温度、流量、压力、厚度、张力、速度、位置、频率、相位等，都有相应的控制系统。在此基础上通过采用数字计算机还建立起了控制性能更好和自动化程度更高的数字控制系统，以及具有控制与管理双重功能的过程控制系统。在农业方面的应用包括水位自动控制系统、农业机械的自动操作系统等。

PPD113B01-10-150000 RF522 ABB 模块 控制器其实从20世纪40年代就开始使用了，早期的现场基地式仪表和后期的继电器构成了控制系统的前身。以PLC和DCS为代表，从70年****始应用以来，在冶金、电力、石油、化工、轻工等工业过程控制中获得迅猛的发展。从90年****始，陆续出现了现场总线控制系统、基于PC的控制系统等，将简要介绍各种常见的控制系统，并分析控制系统的演进过程和发展方向。

ABB集团位列全球500强企业（2008年在世界500强排列第256位，2009年位列第230位，2010年位列第237位），2009至2011年销售额都高达320亿美元。并在苏黎世、斯德哥尔摩和纽约证券交易所上市交易。

安全回路是保护负载或控制对象以及防止操作错误或控制失败而进行连锁控制的回路。在直接控制负载的同时，安全保护回路还给PLC输入信号，以便于PLC进行保护处理。安全回路一般考虑以下几个方面。

（1）短路保护应该在PLC外部输出回路中装上熔断器，进行短路保护。最好在每个负载的回路中都装上熔断器。

（2）互锁与联锁措施除在程序中保证电路的互锁关系，PLC外部接线中还应该采取硬件的互锁措施，以确保系统安全可靠地运行。

（3）失压保护与紧急停车措施PLC外部负载的供电线路应具有失压保护措施，当临时停电再恢复供电时，不按下“启动”按钮PLC的外部负载就不能自行启动。这种接线方法的另一个作用是，当特殊情况下需要紧急停机时，按下“急停”按钮就可以切断负载电源，同时“急停”信号输入PLC。

（4）极限保护在有些如提升机类超过限位就有可能产生危险的情况下，设置极限保护，当极限保护动作时直接切断负载电源，同时将信号输入PLC。

PPD113B01-10-150000 RF522 ABB 模块 控制器

The PPD113B01-10-150000 RF522 ABB Module controller is meant to hold and change any amount of interest or variable within a machine, mechanism or other equipment in the desired manner. At the same time, the control system is implemented to make the controlled object reach the predetermined ideal state. The control system tends the controlled object to a certain desired stable state.

PPD113B01-10-150000 RF522 ABB module controllers have been widely used in various fields of human society. In industry, there are corresponding control systems for various physical quantities encountered in the production process of metallurgy, chemical industry, machinery manufacturing, including temperature, flow rate, pressure, thickness, tension, speed, position, frequency, phase, etc. On this basis, a digital control system with better control performance and higher degree of automation, and a process control system with dual functions of control and management have been established by using digital computer. Applications in agriculture include automatic water level control system, automatic operating system of agricultural machinery, etc.

The PPD113B01-10-150000 RF522 ABB modular controllers have actually been in use since the 1940s, with early field based meters and later relays forming the precursor to the control system. Represented by PLC and DCS, since the application of **** in 70 years, it has achieved rapid development in industrial process control such as metallurgy, electric power, petroleum, chemical industry and light industry. Since **** in 1990, fieldbus control systems and PC-based control systems have appeared one after another. This paper will briefly introduce various common control systems, and analyze the evolution process and development direction of control systems.

ABB is one of the world's top 500 companies (256th in 2008, 230th in 2009, 237th in 2010), with sales of $32 billion in 2009-2011. It is listed on the Zurich, Stockholm and New York Stock exchanges.

A safety loop is a loop of interlocking control that protects the load or control object and prevents operational errors or control failures. In the direct control of the load at the same time, the safety protection loop to the PLC input signal, in order to facilitate the PLC protection processing. Safety circuits generally consider the following aspects.

(1) Short-circuit protection should be installed in the PLC external output circuit fuse, short-circuit protection. It is best to install a fuse in the circuit of each load.

(2) Interlock and interlock measures in addition to ensuring the interlock relationship of the circuit in the program, the external wiring of the PLC should also take hardware interlock measures to ensure the safe and reliable operation of the system.

(3) Voltage loss protection and emergency shutdown measures PLC external load power supply line should have voltage loss protection measures, when the temporary power failure and then restore power supply, do not press the "start" button PLC external load can not start by itself. Another function of this wiring method is that when emergency shutdown is required under special circumstances, the load power supply can be cut off by pressing the "emergency stop" button, and the "emergency stop" signal is input to the PLC.

(4) Limit protection In some cases such as elevator class exceeding the limit may produce danger, set the limit protection, when the limit protection action directly cut off the load power supply, while the signal input PLC.

PPD113B01-10-150000 RF522 ABB 模块 控制器