一次性環(huán)保餐具設(shè)備控制系統(tǒng)的研發(fā)成功主要依賴于以下幾個(gè)方面：

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

1、需求分析比較明確。需求分析是系統(tǒng)開發(fā)的基礎(chǔ)，明確的需求分析是明晰業(yè)務(wù)流程和系統(tǒng)功能的關(guān)鍵所在。

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

2、在設(shè)計(jì)上充分考慮了操作簡(jiǎn)單、維護(hù)方便和可靠性上的晑求?？刂泼姘逶O(shè)計(jì)簡(jiǎn)潔明了，PLC選型合理，資源分配設(shè)計(jì)合理。

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

3、周全考慮了成型機(jī)的內(nèi)部結(jié)構(gòu)和功能需求特點(diǎn)，采用簡(jiǎn)單明了的硬件接線設(shè)計(jì)。

3. Considering the internal structure and functional requirements of the molding machine, simple and clear hardware wiring design is adopted.

4、在控制軟件的設(shè)計(jì)上，合理的選擇了程序結(jié)構(gòu)，采用了步進(jìn)指令+高階指令的程序結(jié)構(gòu)、從而解決了掃描時(shí)間過長(zhǎng)的問題。

4. In the design of control software, the program structure is selected reasonably, and the program structure of step instruction and high-order instruction is adopted, so as to solve the problem of long scanning time.

接下來我們來具體了解該餐具設(shè)備控制系統(tǒng)的各組成特點(diǎn)：

Next, we will specifically understand the characteristics of each component of the tableware equipment control system

一、控制面板：

1、 Control panel:

在一次性環(huán)保餐具設(shè)備控制面板的設(shè)計(jì)上主要考慮系統(tǒng)控制操作的方便，避免引起誤操作;另外，需要考慮系統(tǒng)硬件接線的方便、系統(tǒng)線路檢修的方便以及面板整體的美觀。

In the design of disposable environmental protection tableware equipment control panel, the convenience of system control operation is mainly considered to avoid misoperation; In addition, we need to consider the convenience of system hardware wiring, the convenience of system circuit maintenance and the overall beauty of the panel.
                        

二、資源分配設(shè)計(jì)：

2、 Resource allocation design:

資源的分配主要涉及到輸入和輸出點(diǎn)的確定，對(duì)應(yīng)的功能按鈕以及功能的描述等，具體參見表1。為了越加清楚的描述資源的分配，表中同時(shí)列出了PLC的一些內(nèi)部資源的分配，包括時(shí)間繼電器和中間繼電器。

The allocation of resources mainly involves the determination of input and output points, corresponding function buttons and function description. See Table 1 for details. In order to more clearly describe the allocation of resources, the table also lists some internal resource allocation of PLC, including time relay and intermediate relay.

三、硬件線路和軟件設(shè)計(jì)：

3、 Hardware circuit and software design

硬件線路的設(shè)計(jì)比較簡(jiǎn)單，根據(jù)資源表就可以對(duì)PLC的外部接線進(jìn)行設(shè)計(jì)。軟件的設(shè)計(jì)相對(duì)比較復(fù)雜，先需要繪制軟件程序流程圖，從圖中可知，控制程序主要有3個(gè)分支，即點(diǎn)動(dòng)、自動(dòng)和單步執(zhí)行。

The design of hardware circuit is relatively simple. According to the resource table, the external wiring of PLC can be designed. The design of the software is relatively complex. First, we need to draw the flow chart of the software program. From the chart, we can see that the control program mainly has three branches, namely inching, automatic and single step execution.

一次性環(huán)保餐具設(shè)備系統(tǒng)的控制程序采用廠商提供的 PFSOFT開發(fā)工具進(jìn)行開發(fā)，把 PFSOFT軟件安裝在PC機(jī)上，PC機(jī)與PLC相連，打開 PFSOFT開發(fā)界面，編寫LC控制梯形圖程序，梯形圖程序下載到PLC中，可以在PLC上進(jìn)行模擬調(diào)試，調(diào)試平臺(tái)采用“電氣控制與PLC實(shí)驗(yàn)平臺(tái)開始采用常規(guī)控制指令進(jìn)行編程，雖然功能上實(shí)現(xiàn)沒有問題，但由于功能比較復(fù)雜，程序比較長(zhǎng)，以致PLC對(duì)程序的掃描時(shí)間過長(zhǎng)，不符合成型機(jī)控制的要求。放棄常規(guī)控制指令結(jié)構(gòu)，而采用步進(jìn)指令+高階指令的程序結(jié)構(gòu)，使得程序結(jié)構(gòu)越加明晰，程序長(zhǎng)度大大縮短，程序的掃描時(shí)間達(dá)到控制的要求。

The control program of disposable environmental protection tableware equipment system is developed with pfsoft development tool provided by the manufacturer. The pfsoft software is installed on the PC, and the PC is connected with the PLC. The pfsoft development interface is opened, and the LC control ladder program is written. The ladder program is downloaded to the PLC, and the simulation debugging can be carried out on the PLC, The debugging platform adopts "electrical control and PLC", and the experimental platform begins to use conventional control instructions for programming. Although there is no problem in function realization, due to the complex function and long program, the PLC scanning time for the program is too long, which does not meet the requirements of synthetic machine control. By abandoning the conventional control instruction structure and adopting the program structure of step instruction and higher order instruction, the program structure becomes clearer, the program length is greatly shortened, and the scanning time of the program meets the control requirements.