描述
相同i/o点数的系统,用plc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。如果被控对象主要是设备连锁、回路相对很少,采用plc较为合适。
DENTAL PORTABLE MOBILE X- RAY MACHINE SYSTEM DIGITAL a3
DENTAL PORTABLE MOBILE X- RAY MACHINE SYSTEM DIGITAL a4
Image Systems – X Ray Monitor model M21P-H5101 21″
DENTAL PORTABLE MOBILE X – RAY MACHINE SYSTEM DIGITAL 4
DENTAL PORTABLE MOBILE X – RAY MACHINE SYSTEM DIGITAL 3
DENTAL PORTABLE MOBILE X – RAY MACHINE SYSTEM DIGITAL 5
DENTAL PORTABLE MOBILE X – RAY MACHINE SYSTEM DIGITAL 6