The successful research and development of disposable environmental tableware equipment control system mainly depends on the following aspects:

　　1.需求分析相對清晰。需求分析是系統(tǒng)開發(fā)的基礎，明確的需求分析是明確業(yè)務流程和系統(tǒng)功能的關鍵。

　　1. The demand analysis is relatively clear. Requirement analysis is the basis of system development, and explicit requirement analysis is the key to clarify business process and system function.

　　2.在設計上充分考慮了操作簡單、維修方便和可靠性晑請求?？刂泼姘逶O計簡單明了，PLC選擇合理，資源分配設計合理。

　　2. The simple operation, convenient maintenance and reliability requirements are fully considered in the design. The control panel design is simple and clear, PLC selection is reasonable, and resource allocation design is reasonable.

　　3.充分考慮注塑機內(nèi)部結構和功能要求，采用簡單清晰的硬件布線設計。

　　3. Fully consider the internal structure and functional requirements of the injection molding machine, and adopt simple and clear hardware wiring design.

　　4.在控制軟件設計中，合理選擇程序結構，采用指令步進+高階指令程序結構，解決了掃描時間過長的問題。

　　4. In the design of control software, the program structure is selected reasonably, and the problem of too long scanning time is solved by using the instruction step + high order instruction program structure.

　　下面我們詳細了解一下餐具設備控制系統(tǒng)的組成部分:

　　Now let's have a detailed understanding of the components of the tableware equipment control system:

　　即控制面板:

　　I.e. control panel:

　　1.一次性餐具設備控制面板的設計主要考慮系統(tǒng)控制操作的便利性，避免誤操作;此外，還需要考慮系統(tǒng)硬件布線的便利性、系統(tǒng)線路維護以及面板的整體美觀性。

　　1. The design of the control panel of disposable tableware equipment mainly considers the convenience of system control operation to avoid misoperation; in addition, the convenience of system hardware wiring, system circuit maintenance and the overall aesthetics of the panel need to be considered.

　　2.資源配置設計

　　2. Resource allocation design

　　資源分配主要包括輸入輸出點的確定，相應的功能按鈕，功能描述等。詳見表1。為了更清楚地描述資源分配，該表還列出了PLC內(nèi)部的一些資源分配，包括時間繼電器和中間繼電器。

　　Resource allocation mainly includes the determination of input and output points, corresponding function buttons, function descriptions, etc. See Table 1 for details. In order to describe resource allocation more clearly, the table also lists some resource allocation within PLC, including time relay and intermediate relay.

　　3.硬件電路及軟件設計

　　3. Hardware circuit and software design

　　硬件電路設計相對簡單，可以根據(jù)資源表對PLC進行外部布線設計。軟件設計相對復雜，有必要繪制軟件程序流程圖。從圖中可以看出，控制程序主要有點動、自動和單步執(zhí)行三個分支。

　　The design of hardware circuit is relatively simple, and the external wiring of PLC can be designed according to the resource table. The software design is relatively complex, so it is necessary to draw software program flow chart. As can be seen from the figure, the control program mainly has three branches: inching, automatic and single step execution.

　　一次性環(huán)保餐具設備系統(tǒng)控制程序使用供應商PFSOFT開發(fā)工具開發(fā),PFSOFT軟件安裝在PC, PC和PLC相連,打開PFSOFT開發(fā)接口,編寫LC控制梯形圖程序下載到PLC梯形圖程序,可以模擬在PLC調(diào)試,調(diào)試平臺采用“電氣控制與PLC實驗平臺開始采用傳統(tǒng)編程控制指令,雖然在功能上沒有問題，但是功能比較復雜，程序比較長，使得PLC對程序的掃描時間太長，不滿足成型機控制的要求。摒棄了傳統(tǒng)的控制指令結構，采用步進指令+高階指令的程序結構，使程序結構更加清晰，程序長度大大縮短，程序的掃描時間滿足控制要求。

　　The control program of disposable environmental protection tableware equipment system is developed by pfsoft development tool of the supplier. Pfsoft software is installed in PC, PC and PLC are connected, pfsoft development interface is opened, LC control ladder program is compiled and downloaded to PLC ladder program, which can simulate debugging in PLC. The debugging platform adopts "electrical control and PLC experimental platform start to use traditional programming control instructions, Although there is no problem in function, but the function is complex and the program is long, which makes PLC scan the program too long and does not meet the requirements of molding machine control. The traditional control instruction structure is abandoned, and the program structure of step instruction + higher-order instruction is adopted to make the program structure clearer, the program length greatly shortened, and the scanning time of the program meets the control requirements.