Queue

The Queue is element, where the entities are usually waiting for free space in some of the elements, which are successors of the queue. You can set Maximum length of each queue. The number of entities in the queue never can exceed this value. If you put there letter M instead integer value, the maximum length of the queue is unlimited. The Queue order list allows you to set rule for selecting next entity, which will leave the queue. The rules FIFO, LIFO, and SIRO are available. If field Priority is checked, priority becomes primary rule for selecting the entity. In this case entities with highest priority are leaving the queue first. If more entities in the  queue have the same priority, Queue order act as secondary rule. If Priority is not checked, priorities of entities are ignored in the queue.