1/28/2013 12:35 PM | |
Posts: 84 Rating: (1) |
Georgeous, Please read the refrence document which has been addressed bydchartier, cearfully. First of all the send package is Slave Address :Byte Function Code :Byte Start register : Integer (2Byte) Amount of Register (2 Byte) Totaly 6 bytes you will send trough your Modbus card RS485 port to your serial Bus which 9 dvices are connected. If you correctly configured your CP341 card, and if you wried corectly, and if you programmed well, then u will see some response from slave, About the drive, as I told u in my previous post, u need to install driver on engioneering station, then add your CP341 card in hardware, double click on that, then u go to configuration and u can downllaod the driver to your doungle in CP card, also here u should sett some setting for your CP card, such as baud rate and address, and the mode such as RTU, and etc. without readung well the document it is very difficult to program, also please go to the examples of Modbus program by Siemens, will help u more. |
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