DISTRIBUTED TYPE MICROCOMPUTER CONTROLLER USING SERIAL COMMUNICATION AND ELEVATOR CONTROLLER

摘要

PPROBLEM TO BE SOLVED: To shorten an abnormality detection time of each control microcomputer and to surely discriminate between microcomputer abnormality and serial communication abnormality. PSOLUTION: This distributed type microcomputer controller is configured by distributing a plurality of control units 1 to 3 on a transmission line 4 to exchange data by serial communication. The respective control units 1 to 3 have control microcomputers 1a to 3a for executing prescribed control and serial communication controllers 1b to 3c for monitoring the existence/nonexistence of an abnormality in the control microcomputers 1a to 3a and notifying different control units of a microcomputer abnormality signal when an abnormality is determined to exist in one control unit. As a result, for example, about the abnormality in the control microcomputer 1a, the other control units 2 and 3 determine that the microcomputer 1a of the notification source is in an abnormal state from the notification of the microcomputer abnormality signal. In addition, since an increment return method is adopted among the respective control units 1 to 3, the respective control units 1 to 3 determine a serial communication abnormality at the time of receiving no data from other control units within a prescribed time. PCOPYRIGHT: (C)2006,JPO&NCIPI