Re:Re: CANopen Vs J1939

Dear All,




this might be a stupid question, but It really confused me:
CANopen node can work with J1939 node without gateway!


please help me, because in my understanding J1939 isn't compatible with CANopen. Communication between them need gateway.


Another confusing idea is to implement a protocol stack so called J1939 + CANopen, that means it is J1939 but with benefit of CANopen: 
1) using J1939 to define message
2) using CANopen's object dictionary 


Can anybody help to explain above idea,right or wrong,...?


Best Regards
Johnson 








At 2014-04-07 17:32:55,"heikki saha" <[email protected]> wrote:
>Hello Heinz,
>
>Basically version information is useful, but all of the published information is
>maintained by CiA and kept up-to-date. Therefore it is hard to see, what is the
>benefit provided by version information -- if any tool don't find required decoding
>from existing files, they need to be updated. And if decoding is not found after an
>update, there will be some kind of invalid values in use.
>
>I totally agree the use of unicode. It is the most flexible, also to convert into
>more restricted character sets.
>
>Best regards,
>
>-H
>
>Heikki Saha, CTO
>  M.Sc. Automation
>  Dr.Tech. Electronics
>TK Engineering Oy
>Mail address:  P.O. box 810, FIN-65101 VAASA
>Visit address: Yrittäjänkatu 15, FIN-65380 VAASA
>+358 (0)50 588 6894
>[email protected]
>http://www.tke.fi/
>http://www.canopen.fi/
>
>----- Original Message -----
>From: "Heinz-Jürgen Oertel" <[email protected]>
>To: [email protected]
>Sent: Monday, April 7, 2014 10:36:12 AM
>Subject: Re: [CANLIST] Open CANopen information questionnaire
>
>Am Montag, 7. April 2014, 09:28:57 schrieb Simon Byholm:
>> Hello
>> 
>> If you use the URLs in a tool a good solution is to distribute
>> default versions of the file with the tool, then let the tool update the
>> default version by downloading new files from the CiA Website.
>
>That is a good approach.
>Vendor Ids are unique. so getting it from the file saves you one internet access.
>In case the Id is not found in the locale stored file, try to access the internet and check for updated files and store it locally if available. 
>
>For all provided files it is necessary to have a version information inside.
>and here I would prefer the date last updated.
>Given that CiA is an international org, coding of the company names or other text should be Unicode an not ISO-8859.
>
>
>Heinz
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>> 
>> If downloading the file fails because there is no internet connection,
>> or the CiA website is down, or if the file was moved unintentionally
>> the software just uses the stored file, no need to even give an error
>> message to the user.
>> 
>> It's quite likely anyway that, at some point, the tool will be run on a
>> laptop with no Internet.
>> 
>> Simon
>> 
>> Simon Byholm
>> Software Manager / Quality Manager
>> 
>> TK Engineering Oy
>> P.O. Box 810, FI-65101 Vaasa, Finland
>> Visiting address: Yrittäjänkatu 15
>> 
>> Phone: +358 6 357 6306
>> Fax: +358 6 357 6320
>> email: [email protected]
>> web: www.tke.fi
>> 
>> TK Engineering solves your CAN, CANopen, J1939 and NMEA2000 problems by providing the hardware, software and know-how you need to design, manufacture and troubleshoot your industrial and heavy machine CAN networks. Call +358 6 357 6300 or email [email protected] to learn how we can help you solve your CAN related problems.
>> 
>> On 7.4.2014 09:01, Torsten Gedenk wrote:
>> > Hello,
>> >
>> > I would consider to use it for our tools, if CiA garantuees that these file
>> > stay at a defined position at their web site. If the list of profiles and
>> > Vendor-IDs is maintained by CiA, it can be useful for CANopen tools to fetch
>> > the information from the internet.
>> >
>> >> Who others are using the open CANopen information provided by CiA in a
>> >> machine-understandable format:
>> >>    http://www.can-cia.org/index.php?id=917&no_cache=1
>> >> Please reply also, if you are planning to use that information.
>> 
>> --
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