<br> Hello, To communicate with a CAN/DeviceNET bus you will need an interface card in your PC. NI has such cards along with LabVIEW VIs:
http://sine.ni.com/apps/we/nioc.vp?cid=1329&lang=US http://sine.ni.com/apps/we/nioc.vp?cid=1311&lang=US To communicate with Modbus, you will NOT need any special cards but you do need software drivers for it (you'll obviously need an Ethernet card for TCP/IP and Serial port for RS232). There are several options for these drivers, however: 1. Write your own driver VIs. You'll basically implement the Modbus protocol in LabVIEW. Modbus is a simple and open protocol. 2. Try to search the Net for such existing VIs. I believe someone has already written such Modbus VIs. 3. Use the Industrial Automation OPC Servers suite from NI: http://sine.ni.com/apps/we/nioc.vp?cid=4584&lang=US 4. Use any third-party OPC Server for Modbus. NOTE: in case you opt 3 or 4 above: though you may use DataSocket in LabVIEW as an OPC Client, you may want to consider LabVIEW-DSC which has a built-in OPC Client, and hence better support for OPC. Hope this gives you some options. Regards, <i>Khalid </i> <br>
