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选择DCS最基本的三个原则是可靠性、实用性和经济性.首先,系统必须是可靠的,如果系统不可靠,那么先进性、实用性等就无从说起.实用性是指选择系统时要充分地考虑自己应用对象的实际需求,要保证每一需求都尽量满足,但也要适可而止,不必要的高追求会带来成本的大幅度上升.所以,在应用DCS时,首先应仔细地研究被控制对象DCS的具体要求,包括功能和性能的要求,然后再确定选型的人选,再确定系统.一、系统的功能确定一个具体的DCS系统的功能应包括以下11个方面:1.功能概述,概括系统的各项功能,如信号处理功能、控制功能、显示功能、操作功能、管理功能等,然后再逐项明确.2.系统的控制要求,大多数的DCS是用来做过程控制,因此我们首先应确定系统的控制功能,包括控制
First of all, the system must be reliable, if the system is not reliable, then advanced, practical, etc. can not start talking about the practical means that when the system is selected To fully consider the actual needs of their own applications, to ensure that each demand are met as far as possible, but also to be enough, unnecessary high pursuit will bring a substantial cost increase.So, in the application of DCS, the first should be carefully To study the specific requirements of the controlled object DCS, including the requirements of functions and performances, and then to determine the type of candidate, and then determine the system.First, the system functions To determine a specific DCS system functions should include the following 11 aspects: Overview of functions, summarize the various functions of the system, such as signal processing function, control function, display function, operation function, management function, etc., and then one by one clear .2. System control requirements, most of the DCS is used to do the process Control, so we should first determine the system control functions, including control