Decision making for discontinuous conveyors
In a transport system that does not convey continuously, the decision as to whether a transport object can be transferred from one location to another is made directly in the control system. In the first step, this depends solely on the physical occupancy of the system (occupancy status of the subsequent conveyor). Only if conveying is possible is it necessary to check whether the transport object may be transferred and, if so, in which direction.
The transport direction determination (here the instruction to stop is also a possible desired result) must be able to deal with different objects. On the one hand with transport objects that have a transport request and therefore a decision rule for the decision point, on the other hand also with UFOs and fare dodgers. For this reason, instructions on the handling of the latter transport objects must also be stored. If required, you can also use these for transport objects with transport orders, but without special instructions for the current point. This decision makes high demands on the real-time capability of a system. Its architecture determines the flexibility and the possibility of adaptation to the changing needs of the operational business – both positive and negative.
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