本文从以下几个方面探讨L2过程控制系统维修及故障检测:一是维修的基本概述,将故障分为三个方面,并逐一作出说明;二是维修的基本原则,包括由外到内,由软到硬,由简到繁三个方面;三是维修的基本内容与基本方法,包括软件故障的维修,硬件故障的维修,通讯故障的维修方法;四是维修的基本步骤。 This article discusses the following aspects from the L2 process control system maintenance and fault detection: First, the basic overview of the maintenance, the fault is divided into three areas, one by one to explain; the second is the maintenance of the basic principles, including from outside to inside, from Soft to hard, from simple to complex three aspects; Third, the basic content and basic methods of maintenance, including the maintenance of software failures, hardware failure repair, communication failure repair methods; Fourth, the basic steps of maintenance.