Pier, could you as an expert give us an advice for a "cheap" rockwell controller (with all necessary features) that we could purchase for testing. This would help us to validate the Ethernet/IP protokoll before we go to customers : )
Thanks! Julian Am 25.09.18, 13:46 schrieb "Pier Fumagalli" <[email protected]>: Chris, I can definitely do some wire-sharking, but the library I'm using is MIT-licensed, and not too hard to read https://github.com/cmseaton42/node-ethernet-ip Pier On Tue, Sep 25, 2018 at 1:44 PM Christofer Dutz <[email protected]> wrote: > Hi Pier, > > what would be super awesome would be to create a wireshark dump of this > feature and send that to me. > > I have implemented a first version of the EntherNet/IP protocol driver, > but I would call it "highly experimental". > But I'll be working hard on making them more and more mature. And such > WireShark dumps would definitely help. > > Currently on EtherNet/IP devices, I have to address things with an address > format like "#1#2#3" which doesn't contain much usefull information. > Would definitely love using "symbolic addressing" > > Chris > > Am 25.09.18, 05:27 schrieb "Pier Fumagalli" <[email protected]>: > > Julian, > > actually, the Allan Bradley / Rockwell has a nice feature about > "tagging" > variables / memory locations within the PLC itself. > > When reading (at least with the library I'm using) I simply say what > tag I > want to read (e.g. "speed"), optionally a program name (different tags > are > grouped by program, or exist as "controller tag") and all the data type > information associated with it comes back with the value at protocol > level. > > I haven't dug into Chris' work on PLC4X quite just yet (just too much > work) > but I assume it'll work the same as the JavaScript implementation. > > I also assume there's a way to list all those "tags", but that's not > implemented quite yet in the library I'm using :-( Luckily I have > access to > a WindoSH box with the Rockwell software where (through millions of > clicks) > I can actually find the list of tags & such! > > Happy to help in any way... > > Pier > > PS > > On Tue, Sep 25, 2018 at 6:30 AM Julian Feinauer < > [email protected]> wrote: > > > Hi Pier, > > > > thanks for your kind offer. > > Perhaps you can, yes : ) > > > > We had a discussion because the colleagues do not know exactly the > program > > on the plc. > > So the question is to what degree we are able to extract sensible > values > > from the plc. > > > > I know that for an S7 Controller this is basically impossible as all > I can > > request via protocol is an offset and a length from a byte array, so > I have > > to know where bits, bytes, ints or doubles are stored to do the right > > "deserialization". > > On the other hand, I learned from the Modbus Protocol that there are > > specific memory areas which are tied to datatypes, so in the case of > modus > > it should work to request "unknown" variables and perhaps decipher > them by > > comparing their content with whats on the HMI or something. > > > > So my question is how this works for the Allan Bradley / Rockwell > > controller and the Ethernet/IP protocol. > > > > Thank you already! > > Julian > > > > PS.: I will try to find out today what kind of controller this is > exactly. > > > > Am 25.09.18, 00:04 schrieb "Pier Fumagalli" <[email protected]>: > > > > I have a couple of Allan Bradley / Rockwell on my desk (Control > Logix > > and > > Compact Logix, both series 5xxx) and yes, they're both using > > Ethernet/IP as > > the underlying protocol. > > > > I use https://github.com/cmseaton42/node-ethernet-ip to read > from them > > currently... > > > > Anything I can help with? :-) > > > > Pier > > > > On Mon, Sep 24, 2018 at 9:55 PM Julian Feinauer < > > [email protected]> wrote: > > > > > Hey, > > > > > > I talked to a customer today about the integration of a > Rockwell > > > Controller. > > > As I remember (and some google confirmed that) is Rockwell > closely > > related > > > to Ethernet/IP Protocol. > > > Does anybody have any experience with Rockwell controllers? > > > > > > Julian > > > > > > > > > > > >
