Other common functions are part of the natural progression or evolution of the PLC.Controllers based on tag names are an example.Since PLCs are increasingly becoming part of integrated systems-compared to stand-alone controllers,this makes the move from fixed-address designs to tag-name-based systems that make sense.In this way,multiple platforms in the same control system can share a common tag name database,which generally can significantly reduce front-end development work.
其它共同功能则是PLC自然进步或演化的一部分。基于标签名的控制器就是一个例子。由于PLC正在逐渐成为集成系统的一部分——相较于单机版控制器而言，这就使得从固定地址的设计转向基于标签名的系统变得有意义。这样，同一个控制系统内的多个平台，就能够共享一个公用标签名数据库控制工程网版权所有，这一般可以显著降低前端的开发工作。
SORENSEN CENTER-MIKE HOLE LOCATION GAGE
Sorensen PTM12-2.7 12V 2.7A Fixed DC Power Supply
Sears, Roebuck and Co. 100th Anniversary 1886-1986 RARE
Sorensen Power Supply PTM15-2.8D
SORENSEN PLUME MASTER Smoke Evacuation System
85-86 GM “A BODY” 2.8W V-6 MASS AIRFLOW SENSOR
1933 1934 Ford brake stoplight switch Flathead V8 4
