ControlLogix 5550: unsolicited messages on an Ethernet network

To configure an unsolicited message in a ControlLogix processor and route it through a 1756-ENET ControlLogix Gateway to RSLinx Classic on an Ethernet network, complete the following:
From Logix Designer (RSLogix 5000)
  1. Create a message instruction in the ControlLogix processor that is PLC-5 Typed Write, and with a communication path of CIP with Source ID. For example: 1, <slot ID of ENET module>, <output port (normally 2)>, <IP address>.
  2. Specify a unique Source Link ID in the message instruction. This value can be used for all message instructions in this controller.
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
    DDE/OPC Topic Configuration
     dialog box, select the
    Data Collection
     tab.
  5. Select
    PLC-5
     for Processor Type.
  6. Select the
    Advanced Communication
     tab. For Local or Remote Addressing, select
    Remote route
     and configure the bridge type as 1785-KA5 Bridge/5130-KA.
  7. For the Remote ID, use the Source Link ID from the ControlLogix message instruction, and ensure the Remote Network Type is Data Highway Plus (DH+).
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