浙江电力

2019, v.38;No.273(01) 40-47

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基于DCS的设备组合控制方式
Combined Equipment Control Method Based on DCS

莫布林
MO Bulin

摘要(Abstract):

为了解决传统DCS(分散控制系统)的一对一信号采样或输出的设备控制方式在某些应用情况下浪费输入、输出通道和电缆的问题,提出一种将生产流程中信号类型和数量相同的设备信号进行编码、集中控制的设备组合控制方式。以典型的开关量型电动门的控制为例进行设计,介绍该方式面临的问题、主要功能块、程序流程及其4种应用模式,并在DCS平台上实现其适用于各种设备的组合控制块及操作面板。利用PLC(可编程逻辑控制器)设计程序对该方式DCS以外的电路进行关键时间参数的测试,测试结果表明,该方式可适应50 ms及以上的程序扫描周期。对该方式的效果及应用进行分析,指出其是一种兼容原有设备单独控制方式、能够拓展DCS功能、节省通道和电缆的方式。
In order to solve waste of input and output channels and cables in one-to-one signal sampling or output device control method of traditional DCS(distributed control system), the paper proposes a combined equipment control method for coding and centralized control of equipment signals with the same type and quantity in the production process. Taking the control of a typical switch type electric door as an example, the existing problems, main function modules, program flow and the four application modes, and the combined control block and operation panel applicable to various equipment are achieved on DCS platform. PLC(programmable logic controller) design program is applied to test key time parameters of circuit other than the DCS of this method. The test result shows that this method can adapt to the program scanning cycle of 50 ms and above. The effect and application of this method are analyzed. Finally, it is pointed out that the method can be compatible with the original equipment independent control method, expand the DCS function and save channels and cables.

关键词(KeyWords): 组合;编码;译码;分时;采样
combination;coding;decoding;timeshare;sampling

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 莫布林
MO Bulin

DOI: 10.19585/j.zjdl.201901007

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