Sergio Ramos Posted March 8, 2022 Report Share Posted March 8, 2022 Hello! If anyone has any experience or any examples of using the SAEJ1939 Protocol, I would really appreciate some help. I am using a NOx sensor and would like to extract its data to an HMI. I am currently trying to figure out how to utilize the parameters of the J1939 Protocol. I have the values of the Protocol from the user manual but I do not know how to interpret it for the Visilogic Function blocks. For example, to extract the NOx value would I say there are 2 bytes of max data allowed? (Since there a low and high bytes). And for data pointers, does it "point" to the address of a byte or a bit? Also, once the data is received, where would it be stored? And how can I convert it to a readable value? Would I have to convert it from a BIT to a NUM eight times (Since I get a bit of information and not a byte)? I would really appreciate any thought or comments. I have attached the manual, some screenshots, and my program so far. Thanks again. trial j1939.vlp Conti UniNOx12V_spec_11 03 08 (1).pdf Quote Link to comment Share on other sites More sharing options...
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