PLC-5 enhanced: unsolicited messages on a ControlNet network

To configure an unsolicited message in a PLC-5C and route it to RSLinx Classic on the same ControlNet network, complete the following:
From RSLogix5
Create a message instruction in the PLC-5C processor. Refer to the RSLogix5 documentation for details on how to complete this step.
From RSLinx Classic
  1. From the Control bar, select
    DDE/OPC > Options
    .
  2. On the
    General
    tab, select
    Accept UDP Messages on Ethernet Port
    .
    TIP:
    This option is enabled by default in
    RSLinx Classic
     version 4.00 or earlier. Starting from
    RSLinx Classic
     version 4.10, this option is disabled by default.
  3. From
    RSWho
    , right-click the ControlLogix processor, and select
    Configure New DDE/OPC Topic
    .
  4. From the DDE/OPC Topic Configuration dialog box, select the
    Data Collection
     tab and ensure
    Unsolicited Messages
     is selected.
  5. From the
    Advanced Communication
     tab, select
    Local route
     for Local or Remote Addressing.
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