PPD513 ABB 励磁控制器

PPD513  ABB 励磁控制器

PPD513  ABB 励磁控制器

集散系统从工业自动化仪表控制系统发展到以工业控制计算机为中心的集散系统，所以其在模拟量处理、回路调节方面具有一定优势，初期主要用在连续过程控制，侧重回路调节功能。

PLC是由继电器逻辑系统发展而来，主要用在离散制造、工序控制，初期主要是代替继电器控制系统，侧重于开关量顺序控制方面。

近年来随着微电子技术、大规模集成电路技术、计算机技术和通信技术等的发展，PLC在技术和功能上发生了飞跃。在初期逻辑运算的基础上，增加了数值运算、闭环调节等功能，增加了模拟量和PID调节等功能模块；运算速度提高，的能力赶上了工业控制计算机；通信能力的提高发展了多种局部总线和网络(LAN)，因而也可构成为一个集散系统。特别是个人计算机也被吸收到PLC系统中。

PPD513  ABB 励磁控制器

Distributed system from industrial automation instrument control system to industrial control computer as the center of the distributed system, so it has certain advantages in analog processing, loop regulation, the initial mainly used in continuous process control, focusing on loop regulation function.

PLC is developed from the relay logic system, mainly used in discrete manufacturing, process control, the initial is mainly to replace the relay control system, focusing on the switching quantity sequence control.

In recent years, with the development of microelectronics technology, large-scale integrated circuit technology, computer technology and communication technology, PLC has made a leap in technology and function. On the basis of the initial logic operation, the functions of numerical operation and closed-loop adjustment are added, and the function modules of analog and PID adjustment are added. The computing speed is increased, and the ability to catch up with industrial control computers; The improvement of communication capability has developed a variety of local buses and networks (Lans), which can also be constituted as a distributed system. In particular, personal computers have also been absorbed into PLC systems.