用PLC对FES螺杆冷冻压缩机控制系统改造

Improvement of Control System of Screw Ammonia Refrigeration Compressor by PLC

介绍了美国FES螺杆冷冻压缩机控制系统存在的问题,并针对存在的问题提出了改进的措施:用PLC对其原有的控制系统进行了更换,同时指出了在改进过程中应该注意的事项。

The limitation of control system for FES screw ammonia refrigeration compressor made in U. S. is first analyzed. Then a full solution by utilizing PLC to improve process monitoring and controlling performance provided by the former control system. In the end the basic requirements of implementing are also described.