Can Rx J1939 signals?

[bgtwuk]

Gents

Can someone help by showing me a simple J1939 signal in to a can receive.

BGtwuk

[Jakob]

Hello BGtwuk

if you mean how does a J1939 message look, then I have a readout from CAN king.

EEC1:
Identifier: 0C F0 04 00 hex = 217056256 dec
Rate: 15 ms
PGN: F004 hex
Default Priority: 3
DP: 0
Source: 00
Destination: -

SPN: 513 / Byte:3 / Length: 8
Actual Engine Precent Torque [%]

SPN: 190 / Byte:4-5 / Length: 16
Engine Speed [0,125 x rpm]

Actual CAN king readout.

 0   217056256 X       8 255 188 125   0   0 255 255 255    9534.276640 R

I hope this was what you were looking for.
regards Jakob

[bgtwuk]

GHood Morning and Thank you Jakob


I have that too, but am having trouble recieving it properly in my program, Can RX.

Have not got my head around it yet.

Bgtwuk

[niteRider]

You can use the pre-written receive blocks in the J1939 Standard Library, or write the block yourself if it is not included.  You'll need to know the PGN and SPN byte locations to do it, which you can get by purchasing the J1939 Standard or by looking at the documentation provided by the engine provider... attached is one I did for PGN 65110 to receive DEF level and temperature.  Make sure you also have CanKing, as you'll need it to verify your link and reception... it's also handy for ascertaining the Priority, as that can change from engine-to-engine...

[bgtwuk]

Thank You Nite Rider

Well done

Bgtwuk

[Marbek_Elektronik]

Hello,
I want to order some documents about J1939 because of working with Error-Codes from motor and Stage 5 and.......more........

What do you suggest to buy?

J1939-71
J1939-73
or all J1939 documents from SAE?
https://de.wikipedia.org/wiki/SAE_J1939

One document costs 78$.

[tkane]

Usually these are enough
in addition, you should buy J1939DA

[Marbek_Elektronik]

Ok, thanks.
You suggest:
J1939-71
J1939-73
J1939DA
Thats enough?
And documentation from motor-manufacturer.