Time to talk a little about my hobby, the modbus slave simulator is a pretty little beast intended to simulate a good few modbus slaves, why you may ask, well sometimes (actually all the time if you have not got tonnes of wire and a budget) to build a test-rig for your modbus mastering application with lots of slaves attached to it.
I write this little app in about 3 week-ends and origionally it never spoke modbus at all, but a little know TI protocol. I re-worked the innards to support multiple protocols, and TCP/IP connections (I still want to support UDP someday) a few times over so that Ihave a kind of framework to allow new protocols to be added, but my greatest time spent has been on the GUI. Strange working on a GUI, but my latest work (started a week-end ago is actually on the GUI, and it is very time-consuming. Comms is much easier than GUI. MOD_RSSIM is free (link on left).
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