Hi Ben, On Tue, 2021-08-17 at 06:50 +1000, Ben Hutcheson wrote: > Hi Stephen, > > Thank you for the offer and if it's ok I'll certainly take you up on > it. > Sure, what snapshot should I point maven to? Currently I have 0.8.0 that I was playing with a bit yesterday.
> Next week I'll be starting a new job so I won't be contributing for a > while, However I'll try and get something up and running this week. > If you > are able to test it and/or take over the implementation from there it > would > be great. Should I fork the repo? Where do I look for the directions on PR's etc...? Stephen > > Ben > > On Tue, Aug 17, 2021 at 4:25 AM Stephen Snow <s40...@gmail.com> > wrote: > > > I'd be more than willing to setup some equipment for a lab to test > > with. Readily available to me are a couple of Omron CP1-H CPU's and > > a > > Red Lion G3800C (which is outdated, but communicates with > > everything > > ootb), plus I can easily get some Modicon stuff as well. The Omrons > > are > > fitted with serial ports capable of communicating RS-485 in modbus > > RTU, > > and the RLC HMI can talk Modbus TCP as well, so that is without > > laying > > my hands on some Modicon equipment. > > > > Let me know, and I can start pretty much as soon as I clear space > > on my > > lab bench for the setup. > > > > Stephen > > > > > > On Mon, 2021-08-16 at 11:44 +0000, Christofer Dutz wrote: > > > Hi Stephen, > > > > > > it's not that we're dropping anything ... it's just that we > > > haven't > > > put any work into creating such a driver. Some day, if someone > > > stumbles over PLC4X with the need to use ASCII, we might > > > implement it > > > for them (Mabe as a paid-gig or not). > > > > > > In the inital days of PLC4X I invested a huge amount of time into > > > thinking what the industry could need ... I switched to the way > > > more > > > healthy mode of implementing was is actually needed and when it's > > > needed. > > > > > > But I agree ... Modbus TCP, Modbus RTU (over RS or TCP) are > > > definitely flavors we should be supporting. > > > > > > Chris > > > > > > > > > -----Ursprüngliche Nachricht----- > > > Von: Stephen Snow <s40...@gmail.com> > > > Gesendet: Montag, 16. August 2021 13:39 > > > An: dev@plc4x.apache.org > > > Betreff: Re: Modbus RTU > > > > > > So I use modbus in all it's flavours, including modbusRTU and > > > Modbus > > > TCP. And the newer flavours Modicon is using now. Modbus RTU is > > > definitely in heavy use on industrial equipment I encounter. It > > > is > > > commonly a drive networking choice, and a HMI networking choice. > > > So, > > > depending on what is using it ASCII is likely needed too. The one > > > thing you don't want to do is drop ASCII. > > > > > > Regards, > > > Stephen > > > > > > > > > On Sun, 2021-08-15 at 23:48 +0200, Niclas Hedhman wrote: > > > > On 2021-08-15 22:40, Łukasz Dywicki wrote: > > > > > Then each driver flavor of modbus (rtu, ascii, tcp) would > > > > > simply > > > > > need to wrap and unwrap structures coming from an transport. > > > > > > > > seeing the ascii variant since the 1980s or early 1990s. IIUIC, > > > > it > > > > was > > > > mostly used for hand terminals, and not to connect to > > > > computers. > > > > So I wouldn't spend time on that, unless nothing else is > > > > around. > > > > > > > > I haven't checked the mspec in details, but I suspect it is > > > > close > > > > to > > > > fair amount of equipment has extensions that are not in the > > > > specification (well, at least last time I read it about 20 > > > > years > > > > ago), > > > > namely floating point numbers and 32/64-bit integers. It would > > > > be > > > > neat > > > > to support that... > > > > > > > > Unfortunately, I don't have cycles to help out with it. > > > > > > > > Cheers > > > > Niclas > > > > > > > > > > > >
