This machine adopts a full – frequency – conversion AC speed – regulation scheme, and the Yaskawa G7 series frequency converters are selected. Among them, the main hoisting and auxiliary hoisting mechanisms adopt the closed – loop vector control mode. The gantry and trolley mechanisms are translational mechanisms, using the open – loop V/F control mode. The Profibus communication mode is used between the frequency converters and the PLC.
The whole – machine PLC system adopts the master – slave station control mode: the main PLC is from SIEMENS’ S7 – 300 series and is installed in the PLC cabinet. A remote station is set for each of the main hoisting, auxiliary hoisting, gantry, trolley, and the control console, using P + F bus modules. Data is sent and received between the PLC control cabinet and the remote stations via the PROFIBUS bus.
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…
