The Interlock Protection System for Atmospheric and Vacuum Distillation Unit Based on PLC

The application of GE Fanuc series 90-30 PLC made in America for Liaohua 550×104 t/a atmospheric and vacuum distillation unit is introduced.The focal point is on the analysis of the constitution 、configuration、functions and software of the interlock protection system.Since it was used,the system is reliable and the effect ie perfect.