Abstract:The auto-loading trestle of the West Pacific Petrochemical Company Ltd. dalian used the PLC control system formerly, but the system halted frequently and the card was invalid. It has been repaired for several times but the problem still existed. The system was not completely automatic controlled, artificial operation more and error prone. It had a strong impact on production and operation. We introduced the Endress+Hauser’s auto-Loading Manager system from 2014. The batch controller is the core of the system, and it is interlocking with electrostatic grounding, spill-proof switch etc. This system realizes the safety velocity automatic controlled. It effectively improves the measurement precision, avoids artificial operation, reduces the trade dispute, to ensure the safety of the production and running smoothly. It is a completely automatic control loading system and has been running smoothly for two years.