The paper introduce mainly flow of tyre by PLC(programmable logical controller)in balance test of tyre, in order to put tyre to reasonable flow and to improve efficiency of balance test.

本文主要介绍用可编程序控制器在轮胎平衡检测系统的物料流动控制，使物料合理流动，提高检测效率。

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The system is composed of three subsystems, they are the signal monitor subsystem, the PLC (the Programmable Logical Controller) one and the host computer control ore.

该自动化系统分为信号监测、PLC(可编程逻辑控制器)控制、上位机控制三大部分。

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Existing design methods for discrete event control system (DECS) implemented with programmable logical controller (PLC) have disadvantages in efficiency and ease of use.

对于采用可编程逻辑控制器(PLC)实现的复杂离散事件控制系统(DECS)，现有设计方法在效率和易用性等方面存在不足。

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