附带VB和Delphi的例子
西门子ppi协议，支持V区操作，实际应用中足够了，
支持V区的位、字节，字和双字操作，
默认一次可以读取100个字节。
控件默认参数为串口1，PLC地址2，Even效验，波特率9600
使用控件时，一般只需更改2个属性：
1、PLC地址 plcAddress
2、串口号 port
VB and Delphi examples with Siemens ppi agreement, supporting the V zone operations, practical application is sufficient to support V zone bit, byte, word and double word operations, the default time can be read 100 bytes. Controls the default serial port parameters 1, PLC Address 2, Even-efficacy, the use of control, baud rate 9600, generally only need to change two attributes: 1, PLC Address plcAddress 2, serial port, No. (2009-09-07, Delphi, 347KB, 下载88次)