http://en.wikipedia.org/wiki/Modbus http://fr.wikipedia.org/wiki/Modbus http://www.modbus.org/ http://www.modbus.org/tech.php http://www.modbus.org/docs/Modbus_over_serial_line_V1_02.pdf http://www.modbus.org/docs/Modbus_Application_Protocol_V1_1b.pdf http://www.modbus.org/docs/PI_MBUS_300.pdf http://www.modbus.org/docs/Modbus_Messaging_Implementation_Guide_V1_0b.pdf http://www.modbus.org/docs/Object_Messaging_Protocol_ExtensionsVers1.1.doc
That's all pdf you need :-) 2009/10/3 Doriano Blengino <doriano.bleng...@fastwebnet.it>: > Jean-Yves F. Barbier ha scritto: >> Werner a écrit : >> ... >> >>> Depends on what you use it for, it's not free for commercial purposes. >>> >>> You have propably seen >>> http://copyleft.free.fr/wordpress/index.php/libmodbus/ >>> >> >> Thanks Werner, this look interesting. >> >> But AFAIK, GPLv3 & LGPLv3 don't forbid commercial use as far as you provide >> a meaning to get all sources to the client (for short, it's better to supply >> compiled AND source:) and retain the copyleft and credits to original >> creators. >> >> JY >> > I wrote in C, some time ago, an embedded application using modbus on RS-422. > It is not a difficult matter, at least the part I was interested in - my > device acted as a server, and a MMI (a touch screen LCD panel) was > attached to it. > If you are interested in, I can send some C source code and perhaps the > official documentation I used to write it (available for free in the > Internet). I don't remember if my implementation was "full" or had only > the relevant part, but it was simple and short enough to be translated > easily to gambas; there was only the CRC-32 (or whatever checksum) which > was a little CPU intensive, but I suppose an i386 computer has far more > power than a poor embedded microcontroller... > Unfortunately this material is in the computers at work, I have not it > here at home, but the next monday I can fetch them. > > Regards, > > -- > Doriano Blengino > > "Listen twice before you speak. > This is why we have two ears, but only one mouth." > > > ------------------------------------------------------------------------------ > Come build with us! The BlackBerry® Developer Conference in SF, CA > is the only developer event you need to attend this year. Jumpstart your > developing skills, take BlackBerry mobile applications to market and stay > ahead of the curve. Join us from November 9-12, 2009. Register now! > http://p.sf.net/sfu/devconf > _______________________________________________ > Gambas-user mailing list > Gambas-user@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/gambas-user > -- Cordially. Small Eric Quotations of the days: --------------------------------------------------------------------------- I have no special talents. I am only passionately curious ------------------------------------------------------------------------------ Come build with us! The BlackBerry® Developer Conference in SF, CA is the only developer event you need to attend this year. Jumpstart your developing skills, take BlackBerry mobile applications to market and stay ahead of the curve. Join us from November 9-12, 2009. Register now! http://p.sf.net/sfu/devconf _______________________________________________ Gambas-user mailing list Gambas-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/gambas-user
