Main Shaft Hoisting Signaling and Automatic Load/Unload Control System

Integrates Hoisting, Loading, and Unloading control system, eld bus communication with direct cable connection as backup, Hydraulic Station status is also monitored.




  • Applied PLC as central control unit, and field bus network for communication.
  • System power voltage AC127V, individual isolate transformer with UPS in secondary.
  • 20% more backup I/O in Load/Unload control system.
  • Hoisting control system communicate with Unload control system by fieldbus and direct cable connection, Watch Dog signals from both side are monitoring each other.
  • Unloading System records hoist batch and hoisted coal volume,and has Report function with hardcopy.
  • Load/Unload system control mode: Auto/Manual/Manual without Interlock/Test.
  • Hoist signaling system: Auto/Manual/Backup Signal System/Test.
  • Load/Unload: #1 Skip work/ #2Skip work/ Double Skip work
  • Cord Check:at Main/at Tail
  • Hoisting Mode: Coal/People/Maintenance
  • Hoisting speed: Normal/Slow
  • The system monitor and control hydraulic station of load/unload system as well.
  • The system monitor coal level in Load Bin and Unload Bin as well.
  • Setting method: Set Capacity, Set Weight, Set Time. The regular
  • operation is Set Weight, while checked by Set Capacity. The Set Time works as backup.




System Configuration




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