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Shipping Bin Model Correctly Wired
 This is a 3-D replica of a battery-operated model used in FGIS gate testing classes. The model shows the bottom of a shipping bin, with a slide gate to control the discharge of grain. Below the bin gate is a pair of slide gates which form a diversion point. This model is fully functional. The gates are operated by clicking on the buttons with the mouse. Opening the "SHIP GATE" allows grain to flow to the ship. Opening the "RETURN GATE" allows grain to flow back to the elevator (house). Due to the high cost of virtual soybeans, this model has only two. The model incorporates the basic elements of a monitoring and control system:
 
  • Each gate has two LIMIT SWITCHES which act as input elements, telling the system whether the gate is closed (CL) or fully open (FO).

 

  • The indicator elements are INDICATOR LIGHTS, which tell the operator the current state of the system.

 

  • The controls are PUSHBUTTONS which let an operator tell the system to move gates or change the status of the shipping bin. The words "SHIP," "HOLD", and "REJECT" on the shipping bin are status buttons, which set the shipping bin to a certain status when clicked. The current shipping bin status is shown by the illuminated button.

 

  • The output elements, not shown, power the electric motors which move the gates.

 

  • The logic element, also not shown, is a RELAY which forces the bin gate closed unless certain conditions are satisfied. When the bin is in HOLD status, the relay keeps the bin gate shut. When the bin is in SHIP status, the bin gate is forced closed if any grain can flow back to the house. When the bin is in REJECT status, the bin gate is forced closed if any grain can flow to the ship.

 

The monitoring and control system shown is properly wired. The indicator lights show the true positions of the gates, and the relay removes the gate's permission to open at the right times. You can operate the model and move around it.

 

NOTE: If the model does not appear below you do not have a VRML player installed.