Hi Stephan, Hey that's cool, I'm assuming you're talking about the Modbus RTU branch?
I haven't taken a look at any documentation for Modbus RTU, but any documentation would go into https://github.com/apache/plc4x/tree/develop/src/site/asciidoc. The asciidoc plugin for intellij works well to get an idea of how it will look. I'd be interested in how the Ethernet/IP driver works with the Micro820, although I suspect there's a long way to go to get it working correctly esp with Rockwell history of having non standard CIP messages. Some other interesting pages, in case you haven't seen them yet. https://plc4x.apache.org/users/getting-started/plc4j.html https://plc4x.apache.org/users/protocols/modbus.html https://plc4x.apache.org/developers/tutorials/writing-driver.html Keeping all communication on the mailing list opens it up for others to comment and provide feedback on your work. Congrats on the testing :) Kind Regards Ben On Thu, Jan 6, 2022 at 1:30 AM Stephen Snow <[email protected]> wrote: > Hi Ben, > Just to let you know I am still testing when I get the opportunity. I > had to return the loaner Modicon PLc but got an Rockwell Automation > Micro820 along the way. I want to start cleaning up documentation now. > I need to continue with testing for Modbus, which I will begin once I > re-install my modbus network (I am adding some other devices than a > PLC). > So what I would like is to know if there is a set of doc's now > somewhere, like maybe howto/FAQ that I can dig into. What I am after is > first to elaborate a bit about how PLC4X constructs a message to > read/write from/to a PLC/device, ie the description of how to do this > with <insert programming language here> at higher level than > imlementation details. This is from the user implemantation POV this > documentation that I want to help with. Also am wanting some help with > proper message building, from the POV of what was intended. I have been > able to connect to both a serial (via USB) cable to a modbus port on a > Modicon M221 PLC and read a data value in Modbus mapped word > corresponding to addresss %MW0 in the PLC. I have also been connected > to the Rockwell Micro820, but have yet to read any usable info from it. > So, I am beginning to build up some information on connectivity errors > seen with improper configuration or malformed connection string, as > well as during hardware issues (on Modbus teminations). This I would > like to incorporate into doc's for help for end users, possibly a > generic mashing together of different PLC OEM's white papers/technical > notes/knowledge base articles about Modbus networks. > So if you have any advice on these topics, please don't hesitate to > provide it, I'm pretty open to suggestions. > > Regards, > Stephen >
