The maintenance of DCS can be divided into:routine maintenance;preventive maintenance and fault maintenance,routine maintenance and preventive maintenance are maintenance carried out when the system does not fail.Fault maintenance occurs after the fault occurs,which often causes some system failures and adversely affects production;on the contrary,preventive maintenance is to carry out planned and regular maintenance of the system when the system is in normal operation,so as to grasp the operating status of the system in a timely manner and eliminate it.The hidden danger of system failure,ensure the long-term stable and reliable operation of the system,and form the concept of regular maintenance.Practice has proved that regular maintenance can effectively prevent the occurrence of sudden DCS failures and form considerable indirect economic benefits.
DCS的维护可分为：日常维护;预防性维护和故障维护，日常维护和预防维护是在系统未发生故障所进行的维护。故障维护发生在故障产生之后,往往已造成系统部分功能失灵并对生产造成不良影响;相反,预防性维护是在系统正常运行时,对系统进行有计划的定期维护,及时掌握系统运行状态、消除系统故障隐患、保证系统长期稳定可靠地运行,形成定期维护的概念。实践证明,定期维护能够有效地防止DCS突发故障的产生,形成可观的间接经济效益。
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