Crane Specifications

When you define cranes for your model, consider the following:

• Crane Graphics In the Resources module, the selected graphic represents the hoist. You may define, edit, and size multiple graphics for the same hoist the same way you create multiple graphics for other resources.

• Units & Multiple Cranes Crane resources limit you to one unit. When you define multiple cranes operating in the same envelope, define them as separate resources—each assigned to the same crane network.

• Downtimes In addition to the clock and usage downtimes you may define for cranes, you can assign cranes to shifts in the same way you assign other resources. When a crane goes down, it moves to the downtime node specified in the DTs dialog. If you do not associate a node with the crane downtime, the crane goes down at its current position.

• Specifications Cranes require separate values for bridge and hoist speed and acceleration. You must enter Speed (Empty), Speed (Full), and Accelerate and Decelerate values for bridge movement along the rails and hoist movement across the bridge. In each field, the format is Bridge Value, Hoist Value (e.g., if you enter "150, 20" in the speed field, the bridge moves at 150 and the hoist at 20 feet per minute). Although you must enter speed values, acceleration and deceleration values are optional (if you leave them blank, ProModel assumes the crane to have an infinite acceleration and deceleration capability. (Hint: this provides better run-time computational efficiency).

• Crane Searches Define Work and Park searches in the same way you define searches for other resources.

• Node Logic Define entry and exit logic for cranes at nodes in the same way you define node logic for other resources.