Routing through bridge devices

Keep the following in mind when communicating using bridge devices:
  • RSLinx Classic cannot communicate through an external bridge device when using the 1756-DHRIO bridge device with the TCP or CNET driver. The problem exists when the first bridge is a 1756-DHRIO device, and the second bridge is not a 1756-DHRIO device (for example, Pyramid Integrator). In this case, the source link ID remains at zero, and the response packets fail. The following limitations currently exist:
    • Offlink routing works through one bridge.
    • Offlink routing works through two or more bridges if the first bridge is a 1756-DHRIO module.
    • Offlink routing does not work through two or more bridges if the first bridge is something other than 1756-DHRIO device.
  • You cannot go from a DHRIO module through a 1785-KA bridge device to a DH network.
  • To go from a DHRIO module through a 1785-KA5 bridge device to a DH485 network, the DHRIO module must be configured using the ControlLogix Gateway Configuration tool. For example, if a 1785-KA5 bridge is on a DH+ network at node 4, and the DH485 LinkID is 13, complete the following:
    1. Select
      File > Browse Network
      .
    2. Select the DHRIO module.
    3. Go to the routing table configuration tab.
    4. Right-click the channel being used and select
      Add Module
      .
    5. Select the
      DH+ Bridge
      .
    6. Enter the DH+ node number of the KA5 (4 in this example), and the LinkID of the DH485 (13 in this example).
    7. Click
      Apply
      . You can now browse through the KA5 module.
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