Multiple Owners of Digital Input Modules

This section applies to standard digital input modules only.
While typically only one owner-controller is connected to an input module, multiple Logix 5000 controllers can own digital input modules as owner-controllers. In this case, the following conditions must exist:
  • The controllers maintain the same configuration.
  • The configuration in each controller uses a Data connection to the input module without output data.
  • The first controller to make a connection to the input module is the only controller that can change the configuration. Therefore, it ‘owns’ the module configuration.
    IMPORTANT:
    If the controller that owns the module configuration changes the configuration, the other controllers are not notified of any changes. See Configuration Changes in an Input Module with Multiple Owners for more information.
  • The controllers that do maintain but do not ‘own’ the module configuration are similar to Listen-only controllers. The difference between the controllers is that the controllers that maintain but do not own the module configuration can use a Multicast or Unicast connection over the EtherNet/IP network.
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