The following figure and table details the trailer life cycle:
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Trailer State
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Trailer State Description
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In Yard
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Use the Check In action to create a trailer in the In Yard state.
The following actions are available in this state:
Occupy: M
oves a trailer into a slot. The trailer state becomes
At Slot and the Yard Slot state becomes Occupied.
Dock: M
oves a trailer to a dock door. T
he trailer state becomes At Dock.
Unload: Unloads the contents of the trailer. The trailer state does not change, but the trailer status becomes Empty.
Load: Loads contents into the trailer. The trailer state does not change, but the trailer status becomes Fill.
Check
Out: Moves the trailer out of the yard. The trailer state becomes Out of Yard.
Delete: Deletes a trailer from the system. The trailer state becomes Deleted.
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At Dock
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Use the Dock action when the trailer is in the In Yard state or the At Slot state to enter the At Dock state. The following actions are available in this state:
Occupy: M
oves a trailer into a slot. The trailer state becomes
At Slot and the Yard Slot state becomes Occupied.
Undock: Moves a trailer to a yard. The trailer state becomes In Yard.
Unload: Unloads the contents of the trailer. The trailer state does not change, but the trailer status becomes Empty.
Load: Loads contents into the trailer. The trailer state does not change, but the trailer status becomes Fill.
Check
Out: Moves the trailer out of the yard. The trailer state becomes Out of Yard.
Delete: Deletes a trailer from the system. The trailer state becomes Deleted.
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At Slot
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Use the Occupy action when the trailer is in the In Yard state or the At Dock state to enter the At Slot state. The following actions are available in this state:
Vacate: Moves a trailer out of a slot. The trailer state becomes In Ya
rd and the Yard Slot state becomes Vacant. When a Yard Slot has a state of Vacant, it can be inactivated for maintenance.
Dock: M
oves a trailer to a dock door. T
he trailer state becomes At Dock.
Unload: Unloads the contents of the trailer. The trailer state does not change, but the trailer status becomes Empty.
Load: Loads contents into the trailer. The trailer state does not change, but the trailer status becomes Fill.
Check
Out: Moves the trailer out of the yard. The trailer state becomes Out of Yard.
Delete: Deletes a trailer from the system. The trailer state becomes Deleted.
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Out of Yard
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Use the Check Out action from any trailer state to enter the Out of Yard state. The following actions are available in this state:
Unload: Unloads the contents of the trailer. The trailer state does not change, but the trailer status becomes Empty.
Load: Loads contents into the trailer. The trailer state does not change, but the trailer status becomes Fill.
Delete: Deletes a trailer from the system. The trailer state becomes Deleted.
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Deleted
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Use the Delete action from any trailer state to enter the Deleted state. No
actions are available in this state.
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