Two-way ring communication system for elevator group control

摘要: Each car controller (10) in a multicar elevator system provides two serial asynchronous full duplex I/O channels to communicate with the next and previous controllers. These allow transmission of message opposite directions (32,34) on communications ring. A single interruption ring, by an interrupted line or disturbed for example, guarantees messages each at least one directions. contains three remote link interfaces. The first interfaces fixtures; buttons, tell tale lights, etc. second related hall position indicator lantern, third group To ensure operation fixtures if fails is switched off, switchover module (28,36) used. purpose connect In event that connects other controller.