Logistic network

This gif shows how robots can load or unload chests in a train station. The train delivers items that are filled intoactive provider chestsand then put into therequester cheststo be loaded onto belts.

Logistics robots are ideal in train stations, since very high item throughput on a short distance is needed.

ALogistic networkis a series of different logistics chests andLogistic robotsall covered by one or more connectedRoboports.

Depending on the type and configuration of the chests and area of theRobotic networkthe robots will transport items between these chests as a power-hungry alternative to moving items manually, or bybeltsorRailway. However, robots offer much higher mobility, since they can fly over obstacles in a beeline.

The player character can also act asRequester chestin theLogistic network, allowing them to request various items be kept at a set limit within their personal inventory. After, they can configure an amount of items; andLogistic robotswill start to move the specified items from the network to the characters inventory.

Do not mix up logistics network andcircuit network. They share common components, but are otherwise disconnected and do not exchange any information. Also, do not mix up logistic network with construction network or combinations of the two calledRobotic network.

Supply the player with 10k items delivered bylogistic robots.

Win the game without building anyactive providerorrequester chests.

Center of theRobotic networkin which theRobotsoperate. Roboport coverage defines the area of the logistic network. Robots need to periodically return here to recharge.

Moves items between Logistic Chests.

Logistic Chest: Pushes stored items into the logistic network.

Logistic Chest: Places stored items at the logistic networks disposal.

Logistic Chest: Stores items currently not requested. Supplies stored items to the Logistic network.

Logistic Chest: Will be filled byLogistic robotsuntil the configured amount is reached, or the chest becomes full. Can request multiple different types of items.

Logistic Chest: Functions as both arequester chestandpassive provider chest.

(1) Default capacity is 1 item per robot. This can be increased by researchingWorker robot cargo size (research).

(2) Logistic chests can also be connected to theCircuit networkwithred wireorgreen wire.

To start with, just use passive provider- and requester chests. Place the passive provider chests at the outputinsertersofassembling machinesand requester chests at the input (let them request the needed items). Place aRoboport, which covers these chests with the inner orange area. Place some logistic bots. The robots will fly out of the top hatch and will begin to work. You can now limit the number of produced item either with thestack limitation-feature.

Logistic network is very capable for creating more and more complex items in a relatively small factory-area. Low complexity and high volume activities over longer distances (like smelting) can (and should) be left using belts or railway network.

The basic thing needed for item transportation areRoboports. When placing the port and hover over it, notice an orange and a larger green area.

The orange zone is the Logistic Network area. This is also the maximum distance for connecting two roboports.

The green zone is the Construction area.

For more info on the specifics of howroboportswork, check the page dedicated to them.

There can be many separate logistic networks. Two roboports are in the same network only if they are connected, as described above. Visually this is represented by a dashed yellow line connecting them. To prevent roboports from linking, the Player needs to build them far enough away from each other so that the orange zones dont touch.

Bots do not fly from one network into another, unless requiring a recharge. Robots will never nest in a different network.

Logistics robots are a priority target of biters, and will prioritize attacking them over many objects in the vicinity of the robots. Destroyed robots will not be replaced, unless automatic control of the robot creation system is used.

Bots are not destroyed when running out of energy, but will be reduced to 20% of their speed, which gives them the chance to recharge eventually and a chance for the player to notice the problem.

Pay attention to robotic networks which form some kind of U-shape (where the shortest way between two chests goes over an uncovered area): if a bot runs out of charge in this area, and cannot return fast enough to a roboport, the bot will be significantly slowed and as a result the logistics network will frequently slow down, with large groups of bots slowly flying over the uncovered area.

Robots may run out of charge on longer journeys. When the charging-queue for the bots gets too long, the bots (and their loads) will slow down. Generally, a roboport can charge between 50 and 70 bots per min, 4 at a time, but are not very efficient at charging large queues of bots and can quickly become overworked. Place more roboports near the first one to share the load.

It is possible to notice negative numbers on the Logistic Network-Screen when looking at network storage. Contrary to common belief, this is intended.

The logistic network numbers report items in provider and storage chests,minus the amount of items scheduled to be picked up by robots.When negative numbers are shown, it means that more items are being requested than are available in the network. There is a deficit. This can be a problem, or intended, depending on the players choice. The negative value is just to explain why items arent being delivered. For example, a deficit of 20 iron plates would look like this:

The delivered number of items in the requester chest can be higher than requested. This depends on the researchedWorker robot cargo size-bonus, since bots will always take as much as they can carry if an unlimited amount is available.

This overview reflects the priorities in which order the chests are filled/emptied.

Logistic robots on the logistic network looks for orders by the chests in this order:

item is first looked up in the active provider chests, then in the storage chests, then the passive provider chests. So, the active provider chests are emptied first, then the storage chests, then the passive provider chests.

If robots are free and there is space left in storage chests, and there are unrequested items in an active provider chests, the items are moved from active provider to a storage chest.

For the storage chests, the bots search for one storage which has the same item already. If that cant be found, they choose the first storage chest with a free slot from the list, which is sorted by the order they were built in.[1]This is to avoid having storage chests with different items inside, allowing greater organisation.

Storage chests will be filled with items from active provider chests, and from construction robots that have had their orders cancelled while they were carrying items.

The bots fulfillall requests with the same priority. The algorithm looks for the next free robot, then the next request in the queue and after giving orders to the robot, this request is put at the end of the queue, so that first all other requests are done.

When looking to pick up requested items from multiple chests of equal priority, bots will always choose the closest one.[2]This is however only true when an item is being requested, not when an item is sent away.[3]In the case of items being sent into the logistics network distance does not matter, and the rules laid out above matter instead.