详情：

※产品参数：ABB DSPC174 处理器板 工控备件PLC系统模块

  产品lD:ESE05461R1AB型号名称DSPC174日录描述DSPC174处理睦板附加信息ABE型号名称DSPC 174核心信用0.00原产国瑞典(SE)海关关税编号85389091框架尺寸备件重0.95kq发票描述:DSPC 174处理器板定制:无介质描述:处理器板低订购数量:1件订购数量:1件包装级别1毛重:0.95 kg包装级别1

程序设计  

    1.程序设计  

    根据系统的控制要求，采用合适的设计方法来设计PLC程序。程序要以满足系统控制要求为主线，逐一编写实现各控制功能或各子任务的程序，逐步完善系统指定的功能。除此之外，程序通常还应包括以下内容：  

    1）初始化程序。在PLC上电后，一般都要做一些初始化的操作，为启动作必要的准备，避免系统发生误动作。初始化程序的主要内容有：对某些数据区、计数器等进行清零，对某些数据区所需数据进行恢复，对某些继电器进行置位或复位，对某些初始状态进行显示等等。  

    2）检测、故障诊断和显示等程序。这些程序相对独立，一般在程序设计基本完成时再添加。  

    3）保护和连锁程序。保护和连锁是程序中不可缺少的部分，必须认真加以考虑。它可以避免由于非法操作而引起的控制逻辑混乱。  

    2.程序模拟调试  

    程序模拟调试的基本思想是，以方便的形式模拟产生现场实际状态，为程序的运行创造必要的环境条件。根据产生现场信号的方式不同，模拟调试有硬件模拟法和软件模拟法两种形式。  

    1）硬件模拟法是使用一些硬件设备（如用另一台PLC或一些输入器件等）模拟产生现场的信号，并将这些信号以硬接线的方式连到PLC系统的输入端，其时效性较强。

    2）软件模拟法是在PLC中另外编写一套模拟程序，模拟提供现场信号，其简单易行，但时效性不易保证。模拟调试过程中，可采用分段调试的方法，并利用编程器的监控功能。

     （六）硬件实施  

    硬件实施方面主要是进行控制柜（台）等硬件的设计及现场施工。主要内容有：  

    1)设计控制柜和操作台等部分的电器布置图及安装接线图。  

    2)设计系统各部分之间的电气互连图。  

    3)根据施工图纸进行现场接线，并进行详细检查。  

    由于程序设计与硬件实施可同时进行，因此PLC控制系统的设计周期可大大缩短。  

    （七）联机调试  

    联机调试是将通过模拟调试的程序进一步进行在线统调。联机调试过程应循序渐进，从PLC只连接输入设备、再连接输出设备、再接上实际负载等逐步进行调试。如不符合要求，则对硬件和程序作调整。通常只需修改部份程序即可。  

    全部调试完毕后，交付试运行。经过一段时间运行，如果工作正常、程序不需要修改，应将程序固化到EPROM中，以防程序丢失。  

※ Product parameters: ABB DSPC174 processor board industrial control spare parts PLC system module

Product lD:ESE05461R1AB Model Name DSPC174 Day Record Description DSPC174 Processing Board Additional information ABE Model Name DSPC174 Core Credit 0.00 Country of Origin Sweden (SE) Customs Duty No. 85389091 Frame Dimension Spare part Weight 0.95kq Invoice Description :DSPC 174 Processor board Customization: None Media Description: Processor board Low order quantity :1 piece Order quantity :1 piece packaging level 1 Gross weight: 0.95kg Packaging level 1

programming

1. Programming

According to the control requirements of the system, the PLC program is designed with appropriate design methods. The program should meet the system control requirements as the main line, write the program to achieve each control function or each subtask one by one, and gradually improve the function specified by the system. In addition, the program should generally include the following:

1) Initialize the program. After the PLC is powered on, it is generally necessary to do some initialization operations to make necessary preparations for startup to avoid misoperation of the system. The main contents of the initialization program are: clear some data areas, counters, etc., restore the required data in some data areas, set or reset some relays, display some initial states, and so on.

2) Detection, fault diagnosis and display procedures. These programs are relatively independent and are usually added when the program design is mostly complete.

3) Protection and interlocking procedures. Protection and interlocking are an indispensable part of the procedure and must be carefully considered. It can avoid the control logic confusion caused by illegal operation.

2. Program simulation debugging

The basic idea of program simulation debugging is to simulate the actual state of the field in a convenient form and create the necessary environmental conditions for the operation of the program. According to the different ways of generating the field signal, there are two forms of simulation debugging: hardware simulation and software simulation.

1) The hardware simulation method is to use some hardware equipment (such as another PLC or some input devices, etc.) to simulate the field signal, and these signals are hardwired to the input end of the PLC system, which is time-efficient.

2) The software simulation method is to write another set of simulation programs in PLC to simulate the field signal, which is simple and easy, but the timeliness is not easy to guarantee. In the process of simulation debugging, the method of segmental debugging can be adopted, and the monitoring function of the programmer can be used.

(6) Hardware implementation

Hardware implementation is mainly for the control cabinet (table) and other hardware design and site construction. The main contents are:

1) Design the electrical layout and installation wiring diagram of the control cabinet and operation table.

2) Design the electrical interconnection diagram between all parts of the system.

3) Conduct on-site wiring according to the construction drawings and carry out detailed inspection.

Because program design and hardware implementation can be carried out at the same time, the design cycle of PLC control system can be greatly shortened.

(7) On-line debugging

On-line debugging is to further conduct on-line debugging through the simulated debugging program. The online debugging process should be gradual, from the PLC only connected to the input device, then connected to the output device, and then connected to the actual load gradually debugging. If the requirements are not met, the hardware and program are adjusted. It is usually only necessary to modify some programs.

After all debugging is completed, it is delivered for trial operation. After a period of operation, if the work is normal and the program does not need to be modified, the program should be solidified into the EPROM to prevent the program from being lost.

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