Fiber Channel Status

The following procedure shows how to program an MSG instruction to obtain the status of the dual fiber channels on a 1756-RM3 redundancy module.
  1. In the program for the redundant controller, create an MSG instruction.
  2. On the Communication tab of the Message Configuration dialog box, configure a path of THIS to the redundancy module.
  3. On the Configuration tab of the Message Configuration dialog box, enter the following parameters.
    Parameter
    Value
    Message Type
    CIP Generic
    Service Type
    Get Attribute Single
    Class
    56 (hex)
    Instance
    1
    Attribute
    66 (hex)
    Destination Element
    The tag that is an array or UDT of two UINTs: first for channel 1 and second for channel 2.
  4. Download and test the MSG instruction.
    See the following table for status value definitions.
    Value
    Description
    0
    Status is undetermined because startup is in progress.
    1
    The channel is disabled.
    2
    The channel is operating normally.
    3
    Packets were lost on one channel during the last 60 seconds.
    4
    One of these conditions exists:
    • Channel 1 is connected to Channel 2.
    • The channel has an intermittent loss of communication.
    5
    The connection is down.
    6
    The SFP transceiver is not detected, not disabled.
    7
    The SFP transceiver is not supported, not disabled. SFP is present.
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