In this system, all mechanisms adopt the electronic voltage – regulating speed – control method. The PLC used is of the S7 – 300 series, and the PLC controls the drives through the (P – DP) communication mode.

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…