【正文】 ...........................................................12 配料生產(chǎn)線控制系統(tǒng)的流程圖 .....................................................................................13 配料生產(chǎn)線控制系統(tǒng)的性能及特點 .............................................................................14 配料自動控制過程 .........................................................................................................144 配料生產(chǎn)線控制系統(tǒng)的硬件設(shè)計 ........................................................................................16 配料生產(chǎn)線的工藝 .........................................................................................................16 可編程控制器 PLC 的選型 ...........................................................................................17 輸入輸出（I/O）點數(shù)的確定 .................................................................................17 內(nèi)存估計 ...................................................................................................................18 PLC 的類型 ..............................................................................................................18 輸入輸出模塊的選擇 ...............................................................................................18 電源的選擇 ...............................................................................................................18 經(jīng)濟性的考慮 ...........................................................................................................19 機型的選擇 ...............................................................................................................195 / 70 變頻器的選擇 .................................................................................................................20 變頻器的概述 ...........................................................................................................20 傳送帶和攪拌機的電機調(diào)速系統(tǒng) ...........................................................................20 變頻器型號的選擇 ...................................................................................................21 電機的選擇 .....................................................................................................................21 電機選擇的基本內(nèi)容 ...............................................................................................21 連續(xù)工作制的電機容量選擇 ...................................................................................23 電機型號的選擇 .......................................................................................................24 系統(tǒng)的硬件框圖 .......................................................................................................255 配料生產(chǎn)線控制系統(tǒng)的軟件設(shè)置 ........................................................................................27 編程軟件 STEP7 的概述 ................................................................................................27 程序設(shè)計常用方法 .........................................................................................................28 經(jīng)驗設(shè)計法 ...............................................................................................................28 邏輯設(shè)計法 ...............................................................................................................28 順序控制法 ...............................................................................................................28 PLC 地址分配 .................................................................................................................29 輸入/輸出的分配如下 ............................................................................................29 PLC 外部接線圖 ......................................................................................................30 PLC 符號表 ..............................................................................................................31 各程序段模塊分析 ........................................................................................................31 初始化參數(shù) ...............................................................................................................31 三種啟動方式 ...........................................................................................................32 傳送帶 1 號運料 ......................................................................................................34 攪拌配料與運走配料 ..............................................................................................35 程序的循環(huán)設(shè)定 ......................................................................................................38 指示燈和報警部分 ..................................................................................................406 系統(tǒng)監(jiān)控畫面編程 ................................................................................................................43 組態(tài)王的簡介 .................................................................................................................43 組態(tài)王與 PLC 的通訊 ....................................................................................................45 組態(tài)變量 .........................................................................................................................46 主畫面 .............................................................................................................................47 實時趨勢畫面 .................................................................................................................49 參數(shù)調(diào)節(jié)畫面 .................................................................................................................49 編程語言 .........................................................................................................................517 結(jié)論與展望 ............................................................................................................................53 結(jié)論 .................................................................................................................................53 心得 .................................................................................................................................53