The main description is on designs such as overall scheme, control program, communication interface between PLC and upper computer, data read program.
本文介绍了立体车库的PLC控制系统总体设计、控制程序设计、PLC与上位机接口的通信方案设计、计算机从PLC读取数据的程序设计等。
If there is a possibility that it will need to be read, either by other programs, or by your program on different hardware, you need to know about data portability.
如果数据可能需要被其他程序或其他硬件上的程序进行读取，那么您就需要了解有关数据可移植性的问题。
The most common mistake is to assume that because an instance of your program wrote the data out, it can read that data back in again without verifying it.
最常见的错误是做出这样的假设：因为程序将该数据写出，该程序就能不用验证再一次将该数据读回去。
A program can present retrieved data in a user friendly format, for example, using graphics in a GUI, to make the data easier to read and use.
程序可以使用用户友好的格式显示检索到的数据，例如，使用GUI的图形使得这些数据易于读取和使用。
These data collections, eventually called "files," were normally used so that a program could generate output that would be read by the next program in a batch sequence.
最终称之为“文件”的这些数据集得到普遍使用，这样一个程序就可以生成可由批处理序列中的下一个程序读取的输出。
Fine-grained access control goes beyond granting or denying the right to execute a program or read a data file.
细粒度访问控制不只是授予或拒绝执行程序或读取数据文件的权限。
Programmers don't usually have to test whether the user running the program is entitled to read a data file or set the system time.
程序员通常不必测试运行程序的用户是否有权读取数据文件和设置系统时间。
Because a file was written and read according to definitions within the program code, there was no external data definition, making data sharing difficult and AD hoc reporting impossible.
由于是根据程序代码内的定义读写文件，没有外部数据定义，这使得数据共享很难且不可能进行专门报告。
The next section of code creates a pipe from the vmstat command, where the program will read data once per second.
代码的下一部分将通过vmstat命令创建一个管道，程序将在其中每秒读取一次数据。
This article discussed how to read and write data to a file from a Python program.
这篇文章讨论了在Python程序中如何从文件读取数据和写入数据到文件中。
Now, Listing 3 shows how to read this data into a Python program and parse the contents of the file.
现在，清单3显示如何把这个数据读入Python程序，并解析文件的内容。
A good stats program will paint the landscape for you, and all you have to do is to be able to read the data and react accordingly.
一个好的统计程序会为你统计好每一个登入网站的信息，你所要做的全部就是阅读那些数据并相应作出反应。
When the spreadsheet stores its data as XML, an XML-aware static reporting program can read that data directly.
电子表格以xml格式存储数据，支持XML的静态报表程序可以直接读取数据。
You will use the RFHUTIL utility program to read a file from a text file and send the data as a message to the EXPORTQ local queue managed by the queue manager QMGR900.
您将使用RFHUTIL实用程序从文本文件中读取文件，并将数据作为消息发送给由队列管理器QMGR900管理的EXPORTQ本地队列。
The host PC read the description data from return information, distributed, load and configured an equipment driver program.
主机从返回的信息中读取描述数据，分配和载入一个设备驱动程序并对设备进行配置。
Chapter 6 describes the drive software of data acquisition and control board. It discusses the design of self checking program, data acquisition and control program, data read and processing program.
第六章介绍了数据采集与控制板的驱动软件的设计，详细阐述了自检程序、数据采集与控制程序以及数据读取与处理程序的设计。
Still others distinguish between objects and values, using the term object for data that can be changed by the program and using the term value for those that are read-only.
还有一些人区分对象和值，用术语对象描述可被程序改变的数据，用术语值描述只读数据。
The usage is very simple, just run the program and then select the EXE or DLL file to read the data from.
用法很简单，只要运行该程序，然后选择exe或DLL文件来读取数据。
This can be useful when polling a serial port for data, as your program can determine the number of bytes in the input buffer before attempting a read.
在查询串口是否有数据到来的时候这一段是很有用的，可以让程序在准备读取之前用来确定输入缓冲区里面的可读字节数。
This can be useful when polling a serial port for data, as your program can determine the number of bytes in the input buffer before attempting a read.
在查询串口是否有数据到来的时候这一段是很有用的，可以让程序在准备读取之前用来确定输入缓冲区里面的可读字节数。
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