HIMA(黑马) F7126黑马安全模块 PLC/DCS备件

HIMA(黑马) F7126黑马安全模块 PLC/DCS备件

HIMA(黑马) F7126黑马安全模块 PLC/DCS备件

相同I/O点数的系统，用PLC控制器比用DCS，其成本要低一些(大约能省40%左右)。PLC没有专用操作站，它用的软件和硬件都是通用的，所以维护成本比DCS要低很多。

一个PLC的控制器，可以接收几千个I/O点(最多可达8000多个I/O)。如果被控对象主要是设备连锁、回路很少，采用PLC较为合适。PLC由于采用通用监控软件，在设计企业的管理信息系统方面，要容易一些。

近10年来，随着PLC控制器价格的不断降低和用户需求的不断扩大，越来越多的中小设备开始采用PLC控制器进行控制，PLC控制器在我国的应用增长十分迅速。随着经济的高速发展和基础自动化水平的不断提高，今后一段时期内PLC控制器在我国仍将保持高速增长势头。

通用PLC控制器应用于专用设备时可以认为它就是一个嵌入式控制器，但PLC控制器相对一般嵌入式控制器而言具有更高的可靠性和更好的稳定性。实际工作中碰到的一些用户原来采用嵌入式控制器，现在正逐步用通用PLC控制器或定制PLC取代嵌入式控制器。

HIMA(黑马) F7126黑马安全模块 PLC/DCS备件

The same I/O points system, with a PLC controller than with DCS, its cost is lower (about 40%). PLC does not have a dedicated operation station, it uses software and hardware are universal, so the maintenance cost is much lower than DCS.

A PLC controller can receive thousands of I/O points (up to more than 8,000 I/O). If the controlled object is mainly equipment chain and the loop is few, PLC is more appropriate. PLC because of the use of general monitoring software, in the design of enterprise management information system, it is easier.

In the past 10 years, with the continuous reduction of PLC controller price and the continuous expansion of user demand, more and more small and medium-sized equipment began to use PLC controller for control, and the application of PLC controller in China has grown very rapidly. With the rapid development of the economy and the continuous improvement of the basic automation level, the PLC controller in China will continue to maintain a rapid growth momentum in the next period of time.

When the general purpose PLC controller is applied to the special equipment, it can be considered as an embedded controller, but the PLC controller has higher reliability and better stability than the general embedded controller. Some users encountered in the actual work originally used embedded controllers, and now they are gradually replacing embedded controllers with general PLC controllers or custom PLC controllers.