As far as I can tell, "Locked Slots" doesn't work.
My test setup is as follows:
Depot: Single train in a LCC configuration.
Provider: "Locked Slots Per Wagon" driven from a constant combinator, set to 10, along with current amount of cargo waiting in chests.
Requester: Requesting cargo.
No other signals are driven to the inputs of the stations, and LTN seems to response correctly in keeping the requester stations needs met. The request is dispatched to meet any asks, and the threshold is respected before a train is dispatched.
I am not sure what I should expect from this configuration. The form manual posts (viewtopic.php?f=214&t=51072) indicates
This seems to indicate what the station expects in trains that are routed to it. This cannot be right, as the Depot clears all cargo wagons of their filter when they arrive.Locked Slots per Wagon (optional) - number of inventory slots per wagon locked for this provider (default=0 false)
The Providing station does not set this value when a train arrives, happily loading a train with whatever slots were blocked off before it arrived.
Another forum topic (viewtopic.php?f=214&t=52471) states
But again, the station takes no action to modify the filters or blocked slots of any train arriving.Locked Slots per Wagon:
Marks the set number of slots are reserved in each wagon for every train going to the provider it's set for.
Used to prevent inserters from getting stuck with items in hand after failing to insert into a wagon.
I've trived setting this value between various values from 0-40, and the only change I can see is that the trains being dispatched assume they can only pick up the given number of stacks the "Locked Stacks" value is set to, yet the Depot makes sure that the value is cleared before the train is sent?!?
Given that the Depot cleans these values when a train arrives, and the Provider does not set them when filling an order, what is the use of this setting? If this is not a filter, and not an action that the LTN station provides, what is it supposed to do?
