Patent ID: 6672429
Filing Date: 2004-01-06
Classification: B66B

Abstract:
In an elevator system having a car with a door, a plurality of landings, means for moving said car between landings, a door drive for selectively opening and closing said door, a control processor for controlling at least some of the operations of said elevator system responsive to I/O data, wherein said control processor is programmed with a communications protocol to generate and receive data packets containing an I/O identification field, and a plurality of I/O devices communicating over a serial data communication line with said control processor and having means to generate and receive data packets containing said I/O identification field, the improvement wherein each I/O device is assigned a 2-byte identification in which the first byte a general category representing the type of function performed by the I/O device, and the second byte of the said device within its general category, and wherein said control processor and I/O devices are programmed to generate data packets, and to recognize data packets, containing the said 2-byte identification in said identification field.