Hi Chris, I would really love to help you with this but my understanding of the S7 communication is too bad for this.
And as a side note... Moka7 is the main reason we are now switching to PLC4J... : > Julian Am 16.08.18, 10:19 schrieb "Christofer Dutz" <[email protected]>: Hi Julian, Jeah ... Moka7 ... that was the code I usually mention when I talk about old driver NOT being able to run safely on multi-core machines ;-) Also I wouldn't like to "borrow" code from that project, as it's GPL. But I think I know how I could setup a testcase that might be able to pull out the information we need. Let's concentrate on finding out the type of S7 on the other side: Ok ... SZL = Systemzustandsliste ... really interesting how official naming does show the German origin ... was looking for an English acronym. So it seems to be a IsoTP(DATA) packet with a S7(USER_DATA) payload. This contains a parameter of type CPU_SERVICES ... I'll whip something up (hopefully today) ... shouldn't be that difficult. Chris Am 16.08.18, 09:36 schrieb "Julian Feinauer" <[email protected]>: Hey Chris, thanks for your reply. Unfortunately I cannot help you with gathering the types based on the protocol messages (we also have only one type here so reverse engineering is kind of... difficould). But what I "know" is how to read it from the SPS via request (we could send this request directly after establishing connection?). The necessary telegrams to send are here https://github.com/xtrinch/moka7-live/blob/master/src/com/sourceforge/snap7/moka7/S7Client.java (Labelled as S7_SZL_FIRST and S7_SZL_NEXT) and the structure of the response is here https://github.com/xtrinch/moka7-live/blob/master/src/com/sourceforge/snap7/moka7/S7CpuInfo.java I don't know if this helps you and how easy this can be adopted to the Structure in PLC4J as the github code is really... well... nevermind ; ) But as I understand you correctly we need to have a logic that does unmarshalling of byte[] to some Class based on (possibly) several conditions and then in the unmarshal logic we do the unmarshalling based on the enum you create, right? Julian
