Author Topic: Can Rx J1939 signals?  (Read 13729 times)

bgtwuk

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Can Rx J1939 signals?
« on: March 24, 2014, 12:14:42 AM »


Gents

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

BGtwuk

Offline Jakob

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Re: Can Rx J1939 signals?
« Reply #1 on: March 24, 2014, 10:49:41 AM »
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

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Re: Can Rx J1939 signals?
« Reply #2 on: March 24, 2014, 12:19:45 PM »
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

Offline niteRider

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Re: Can Rx J1939 signals?
« Reply #3 on: March 24, 2014, 04:55:33 PM »
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

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Re: Can Rx J1939 signals?
« Reply #4 on: March 24, 2014, 05:23:11 PM »


Thank You Nite Rider

Well done

Bgtwuk

Offline Marbek_Elektronik

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Re: Can Rx J1939 signals?
« Reply #5 on: June 26, 2018, 08:45:58 AM »
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$.
Marbek Elektronik, Dipl.-Ing. Bernd Konrad
Dienstleistung, Entwicklung, Herstellung

Offline tkane

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Re: Can Rx J1939 signals?
« Reply #6 on: June 26, 2018, 11:46:27 AM »
Usually these are enough
in addition, you should buy J1939DA

Offline Marbek_Elektronik

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Re: Can Rx J1939 signals?
« Reply #7 on: June 28, 2018, 07:26:08 AM »
Ok, thanks.
You suggest:
J1939-71
J1939-73
J1939DA
Thats enough?
And documentation from motor-manufacturer.
Marbek Elektronik, Dipl.-Ing. Bernd Konrad
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