Local apparatus network for elevator and its sending control method

Application Number: 00122147
Application Date: 2000.07.27
Publication Number: 1312213
Publication Date: 2001.09.12
Priority Information: 2000/1/28 JP 020387/00
International: B66B1/34;H04L12/40
Applicant(s) Name: Mitsubishi Electric Corp.
Inventor(s) Name: Yamada Takuya
Patent Agency Code: 31100
Patent Agent: shen zhaokun
Abstract Provided is a local apparatus network for an elevator and their transmission control method capable of guaranteeing a real-time property. This local apparatus network for the elevator, which has a protocol that a local apparatus having a lower priority order stops transmission when at least two local apparatuses start transmission simultaneously, is provided with transmitting means allowing the local apparatuses to attach their own priority orders to the transmitted data and to make data transmission. Each transmitting means is provided with a priority order changing means lowering its own priority order according to the number of transmissions, a priority order initialization instruction transmitting means transmitting a priority order initialization instruction to each local apparatus when its own priority order becomes the lowest priority order, and a priority order initializing means initializing its own priority order when its own priority becomes the lowest priority order and when a priority order initialization instruction is received from another local apparatus.