Disable or Re-enable SFP Fiber Ports

If you do not plan to use one of the redundant SFP ports on a 1756-RM3 module, you can disable the port via an MSG instruction and re-enable the port when needed.
IMPORTANT: The MSG instruction is only allowed when the redundant chassis pair is
not
 synchronized. If the redundant chassis pair is synchronized, the message attempt fails and the port status and the port remain in their current state of being enabled or disabled.
IMPORTANT: One SFP port must remain active on each redundancy module. If you are only using one SFP port on each module, you cannot disable the active ports.
To disable or re-enable an SFP port via an MSG instruction, follow these steps.
  1. In the program for the redundant controller, create an MSG instruction.
  2. On the Communication tab of the Message Configuration dialog box, configure the path and verify that the Connected checkbox is cleared, and then click Apply.
    IMPORTANT: The MSG must be sent to
    both
     partner redundancy modules, and the path to the secondary redundancy module cannot go through the redundancy module connection.
    Message Communication Configuration to Disable or Enable SFP Port
    Communication Parameters—Disable or Re-enable SFP Port
    Parameter
    Value
    Path
    Primary: 1, [slot of primary redundancy module] Secondary: 1, 2, 2, [IP address of secondary communication module], 1, [slot of secondary redundancy module]
    Connected
    Leave the Connected checkbox cleared.
  3. On the Configuration tab of the Message Configuration dialog box, configure the MSG instruction with the following parameters, and then click Apply.
    Message Configuration to Disable or Enable SFP Port
    Configuration Parameters—Disable or Re-enable SFP Port
    Parameter
    Value
    Message Type
    CIP Generic
    Service Type
    Set Attribute Single
    Service Code
    None - no value needed
    Class
    F6 (EthernetLinkObject)
    Instance
    1 (port 1)
    2 (port 2)
    Attribute
    9 (AdminState)
    Source
    Source tag - DINT - 1 (enable port), 2 (disable port)
    Source Length
    1
    Destination Element
    None - no value needed
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