Apparatus and method for determining messages transmission period in an elevator group control system
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United States of America Patent
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Apr 6, 1999
Grant Date -
N/A
app pub date -
Oct 17, 1997
filing date -
Oct 17, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The present invention relates to a method for transmitting messages in an elevator group control apparatus wherein a plurality of elevator controllers and a separate group controller transmit data using a covalent bus line. The invention comprises the steps of (a) transmitting, through the serial communication bus line, a data transmission period and a data transmission star point of each elevator controller, which are determined in accordance with the number of elevator cars connected with the serial communication bus line by the group controller, to the corresponding elevator controller; and (b) receiving the data transmission period and the start point which are transmitted through the serial communication line from the group controller; and (c) storing the data transmission period.
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