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    How to interpret the Comm Trouble SDIxx or Comm Fail SDIxx display.

    1. Network interface when used on the SDI bus:
    When using the network interface (B420, B426 or DX4020) on the SDI bus addressed as 88 or 92,  Comm Troubles will display as: SDI##  along with the programmed path followed by the device address. 

    Device                        Message                      Failing to Poll on:  
    SDI88              Comm Trouble / Fail SDI 88               Address 88, Path 1
    SDI88              Comm Trouble / Fail SDI 89               Address 88, Path 2
    SDI88              Comm Trouble / Fail SDI 90               Address 88, Path 3
    SDI88              Comm Trouble / Fail SDI 91               Address 88, Path 4

    SDI92              Comm Trouble / Fail SDI 92               Address 92, Path 1
    SDI92              Comm Trouble / Fail SDI 93               Address 92, Path 2
    SDI92              Comm Trouble / Fail SDI 94               Address 92, Path 3
    SDI92              Comm Trouble / Fail SDI 95               Address 92, Path 4

    2.  Network interface when used on the SDI bus:

    Network interfaces (B420 or B426 or B450) addressed as 1 or 2, will display the Comm Trouble SDI## message with the programmed path followed by the device address as follows:

    Device-Addr              Message                      Failing to Poll on:
    SDI2-1             Comm Trouble / Fail SDI 11               Path 1, Address 1
    SDI2-1             Comm Trouble / Fail SDI 21               Path 2, Address 1
    SDI2-1             Comm Trouble / Fail SDI 31               Path 3, Address 1
    SDI2-1             Comm Trouble / Fail SDI 41               Path 4, Address 1

    SDI2-2             Comm Trouble / Fail SDI 12               Path 1, Address 2
    SDI2-2             Comm Trouble / Fail SDI 22               Path 2, Address 2
    SDI2-2             Comm Trouble / Fail SDI 32               Path 3, Address 2
    SDI2-2             Comm Trouble / Fail SDI 42               Path 4, Address 2

    3.  New G Series (B8512G/B9512G) and B Series panels using Onboard Ethernet or Cellular:
    B-Series panels using Onboard Ethernet or Onboard Cellular will display the Comm Trouble SDI## message with the programmed path followed by the device address  as follows:

    Device                        Message                       Failing to Poll on:    
    Onboard Ethernet       Comm Trouble SDI 10           Path 1, Address 0
    Onboard Ethernet       Comm Trouble SDI 20           Path 2, Address 0
    Onboard Ethernet       Comm Trouble SDI 30           Path 3, Address 0
    Onboard Ethernet       Comm Trouble SDI 40           Path 4, Address 0

    Onboard Cellular         Comm Trouble SDI 18           Path 1, Address 8
    Onboard Cellular         Comm Trouble SDI 28           Path 2, Address 8
    Onboard Cellular         Comm Trouble SDI 38           Path 3, Address 8
    Onboard Cellular         Comm Trouble SDI 48           Path 4, Address 8

    • Comm Trouble: Displays when the panel is not receiving an acknowledgement from the receiver prior to making retry attempts.
    • Comm Fail:   Displays when the panel has not received an acknowledgement from the receiver prior to exhausting all of the programmed retry attempts.
    • How to calculate the network supervision intervalSupervision time= Poll Rate + Ack Wait + [Ack Wait x Retry Count]
      Example:
      Poll =240
      Ack=10
      Retry Count=10
           Supervision time = 240 + 10 + (5 x 10) = 300 seconds
                                        or  250 + 50 = 300seconds

    DX4020, B420, 426

    Version history
    Revision #:
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    Last update:
    ‎05-22-2018 03:58 PM
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