A new method on plc circumscribed analog module 外接模擬量模塊的1種新方法
Process - control analog modules 過(guò)程控制模擬模塊
There is a lack of analysis apparatus of magnet , the new system is only a opened loop control system , if we add the analysis part of the ion eletrostatic accelerator someday , all that we need to do is adding analog module hi plc and sampling control arithmetic hi the computer program . we will get a perfect closed loop control system 在目前缺乏磁分析儀的情況下,該系統(tǒng)雖然還只是開(kāi)環(huán)控制系統(tǒng),但是一旦加速器中束線分析部分到位,它只需增加模擬量輸出模塊和采樣控制算法,就能形成完善的閉環(huán)控制系統(tǒng)。
The structure , function and characteristic with the principle and method of tank gauging system are described . then the structure , principle of the circuit and the main chips of the data processing unit are introduced . after this , the software design of data processing unit including rs - 485 ( modbus ) module , 4 - 20ma analog module , on - off module , rtd module , pulse module , calculation and display module , communication module and neuron chip program module and also the method of resolving the problems which were found at the process of debugging are emphasized 隨后介紹了現(xiàn)場(chǎng)數(shù)據(jù)處理器的結(jié)構(gòu),電路原理,所運(yùn)用的主要芯片;并重點(diǎn)闡述了作者在課題研究中所作的工作,即現(xiàn)場(chǎng)數(shù)據(jù)處理器軟件的設(shè)計(jì)包括八個(gè)功能模塊: rs - 485 ( modbus )模塊、 4 ? 20ma模擬量采集模塊、開(kāi)關(guān)量處理模塊、 rtd信號(hào)采集模塊、頻率量采集模塊、計(jì)算和顯示模塊、通訊模塊、 neuron芯片中的程序模塊;以及在課題研究和現(xiàn)場(chǎng)調(diào)試過(guò)程中遇到的問(wèn)題及解決辦法。