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 >
