On 2/27/2012 2:48 PM, Chris Morley wrote: > > >> There may be a function that can look this up, but I think it's hard for >> the API to know what network the app needs to use, although 99% of the >> time the host has a single Ethernet port making the practical choice >> easy. I got the libmodbus 3 unit-test demo to work by just doing a >> ifconfig to to get my IP address and plugged that in. That's all that >> was needed. RTU over TCP is probably a different story. My LinuxCNC >> master could send queries just fine, but the unit-test slave isn't set >> up to return anything interesting. Successes for unit-test demo seems to >> be a lack of error messages. >> >> > CL requires the address and the port number (9502 id default). > I somewhat understand the address but not really the port number. > Can you elaborate how you found this info? keep in mind I have > almost no knowledge of networks other then plugging in my ethernet cable > in to my cable internet router. :) > > Chris M > > ------------------------------------------------------------------------------ > Try before you buy = See our experts in action! > The most comprehensive online learning library for Microsoft developers > is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, > Metro Style Apps, more. Free future releases when you subscribe now! > http://p.sf.net/sfu/learndevnow-dev2 > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > >
Chris, I found a Windows based Modbus test software package on the web and used that to test the Modbus TCP functions a while back. It was very easy to establish a link between the Windows box and CL. I had to setup the IP addresses, and port numbers on each computer but after that everything came up and ran. I first tried it with a simple switch and then went to a crossover cable - both worked. The Modbus test software was really nice since it displayed the packets. I never tried the Modbus TCP slave functions but I would like to set that up some day. Dave ------------------------------------------------------------------------------ Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
