View the maximum and used Ethernet nodes for a controller

Some controllers have limits on the number of Ethernet nodes they support in the I/O Configuration tree. When a device is added directly to the Ethernet I/O configuration, it is counted toward the node limitation of the controller.
The
Capacity
tab of the
Controller Properties
 dialog box shows the current number of used Ethernet nodes in the I/O Configuration tree and the maximum number of Ethernet nodes supported by the controller.
When the controller is online and the controller enforces the node count, the following occurs when the node count exceeds the limit:
  • An error dialog box appears.
  • The I/O module cannot be added to the I/O Configuration tree.
When the controller is offline and the controller enforces the node count, the following occurs when the node count exceeds the limit when the project is verified or the controller attempts to go online:
  • An error message is generated on the
    Error
     tab of the
    Output window
    .
  • The project cannot be downloaded to the controller.
    TIP:
    The 1756-L85E controllers do not enforce the node count, meaning the system does not prohibit you from connecting additional nodes, and it may be possible to download the project. The system provides a warning when the recommended node limit has been exceeded.
To view the maximum and used Ethernet nodes for a controller:
    1. On the
      Online
      toolbar, click the
      Controller Properties
       icon.
    2. On the
      Controller Properties
       dialog box, click the
      Capacity
       tab.
  2. In the
    Ethernet Node
     group, view the information about the Ethernet nodes.
    • Maximum/Recommended Maximum
       - shows the maximum or recommended maximum number of Ethernet nodes for the controller
    • Used
       - shows the current number of Ethernet nodes in the I/O Configuration tree
If the number of used Ethernet nodes exceeds the maximum number, L5k_node exceed limit icon appears next to the
Used
 parameter when controller is offline.
For the 1756-L85E controllers, if the node count exceeds the recommended limit, L5K_node_yellowcautionicon appears next to the
Used
 parameter and the following message appears:
The recommended node limit has been exceeded. It may be possible to connect additional nodes depending on the node type and system architecture.
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