The 75t/5t overhead crane in Pakistan was put into use in 1992. After years of operation, the original electrical control system became obsolete and could no longer meet the needs of the owner. At the owner’s request for renovation, Jianhuan Company provided a one – stop service including scheme design, electrical control manufacturing, and electrical control system debugging. On December 5, 2017, the project successfully passed the owner’s acceptance.
The entire electrical control system adopts Siemens S7 – 300 for centralized control. A 10.4 – inch touch screen is used to monitor the operating status and faults of the equipment. All the main hoisting, gantry, and trolley mechanisms are driven by ABB ACS880 series frequency converters.

Feihua Wireless Intelligent Crane Control System
This control system employs two sets of Siemens PLCs, and Mitsubishi frequency converters are used for each mechanism. Absolute encoders are installed on each mechanism, and a Siemens touch screen is set on the operating console. Wireless data transmission is…