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92 - Chapter 6. ControlLogix Family - Example PLC Programs IO-Link Master EtherNet/IP Reference Manual: 2000589 Rev. A
Example PLC Program Operation
successfully.
• The ISDU response is retrieved until the response received indicates either a success (2) or error
(3 or 4).
f. Rung 6:
• When the PrtN_GetPortInfo tag is enabled, this rung sends an explicit message to request the IO-
Link port information block.
•The PrtN_GetDevInfo tag is enabled in Rung 0 whenever the IO-Link Master connection status
transitions from inactive to active.
g. Rung 7:
This rung monitors the various explicit messages for completion.
• Controls the non-blocking ISDU request process by enabling messages to retrieve the ISDU
response until the request has completed.
• Sets the various flags when a get port information message has completed.