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Communications control system for elevators

  • US 6,467,583 B1
  • Filed: 11/05/2001
  • Issued: 10/22/2002
  • Est. Priority Date: 04/12/2000
  • Status: Expired due to Term
First Claim
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1. A communications control system for elevators, in which a plurality of control units are inter-connected via a network and each control unit receives its own logical destination from an external location, the system comprising:

  • a first control unit for detecting an initialized state of the network and operating as a network master node governing synchronization control among the plurality of control units when the first control unit is the first to send out, to the network, a network master node candidate request having a logical destination of the first control unit attached thereto; and

    a second control unit for operating as a sub-node obeying the network master node when the initialized state of the network is not detected.

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