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Thread: Bussman J1939 mVEC

  1. #1
    Join Date
    Aug 2009
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    ifm Exton, PA
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    Default Bussman J1939 mVEC

    **NOTE**
    This is an older version of the mVEC blocks. See below for the latest version!

    Attached are some blocks and samples for communicating with the Bussman J1939 multiplexed vehicle electrical center (mVEC). This version does not use the status replys from the relay commands (ON/OFF). It does however monitor the fuses and relays for faults (OPEN, SHORT, etc).

    The default base source ID is 16#A0. The mVEC_MAPPING sample shows how to change the base source ID of the mVEC. Refer to the Bussman manual for more details.

    Also note attached New Product Bulletin from Cooper Bussman.
    Attached Files Attached Files
    Last edited by Jeremy Kopicz; 05-25-2011 at 04:37 PM.

  2. #2
    Join Date
    Nov 2009
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    5

    Default Cooper Bussman Contact

    Below is the contact information for Matt at Copper Bussman.

    Matt McWhinney
    Key Account Manager – Cooper Bussmann Transportation Products
    312.878.8252 (v )
    636.207 4467 (direct fax)
    matt.mcwhinney@cooperindustries.com

  3. #3
    Join Date
    Aug 2009
    Location
    ifm Exton, PA
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    195

    Default New mVEC blocks r20100311

    SEE NEWER VERSION BELOW!!!


    Attached is a new version of the mVEC control function blocks and documentation on use. These blocks are designed for the 16 bit controllers running firmware version 50001 or later. (Tested with v50001).

    Also attached is a sample program developed for a CR2500.

    To use use the Project>Import function to import the blocks into your program. You can delete the blocks for a buss you are not using.

    NOTES:
    • I removed all use of pointers since this seem to cause issues with J1939 operation
    • Added blocks for both CAN1 and CAN2 (These are for 16 bit only)
    • Added enabling and use of high side output
    • Added enabling of the mVEC message monitor so it sets all relays to a default state if comms are lost for 2 seconds (2 seconds is the mVEC timeout time.)
    • removed the enable and init parameters from the main block.
    • Added an inhibit time for the main block since i trigger messages on change of state and RPT time.
    • Added a word that indicates the actual state of the relays and hi side output (on or off).
    Attached Files Attached Files
    Last edited by Jeremy Kopicz; 05-25-2011 at 04:36 PM.

  4. #4
    Join Date
    Aug 2009
    Location
    ifm Exton, PA
    Posts
    195

    Default Updated mvec blocks!!

    Latest version is further optimized when using multiple mVECS on a single CANBus system. Replace the previous version with this one. Documentation still applies.
    Attached Files Attached Files

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