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  1. #1
    Join Date
    Jul 2002
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    Different device instances on the same network

    I've always put each manufacturer's devices on their own wire and numbered the netwrok whatever they shipped. Now I've got two different mfg on the same wire and they each have their own instance numbers. Will I have to get someone from the factory to come out just to chnage their network number to match mine or will it matter? Haven't tried to discover it yet.

  2. #2
    Join Date
    Jan 2003
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    Device Instances have to be unique throughout the entire system, unless your JCI.

    IP, MSTP, or something else?
    Propagating the formula. http://www.noagendashow.com/

  3. #3
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    Thread Starter
    I was able to discover the Carrier rtu. It came with a network number of 16101. The other mfg on the wire is 77000. If it seems to work is there any reason to change it? I thought it should match the physical port ib the jace.

  4. #4
    Join Date
    Feb 2005
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    never really seen a device that defines a network#.
    usually network# is defined in BACnet routers or high level devices where they are the route master.

  5. #5
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    Thread Starter
    Page 178 says " The Device Instance is auto generated by default and is derived by adding the MAC address to the end of the Network Number. The Network Number of a new UPC Open controller is 16101, but it can be changed using i-Vu Tools or BACView device.

    http://dms.hvacpartners.com/docs/100...48_50A-13T.pdf

  6. #6
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    Long as those device instances don't clash, you should be fine.
    Propagating the formula. http://www.noagendashow.com/

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