Rockwell Automation Publication 1734-UM020B-EN-E - August 2019 63
Appendix
C
Troubleshooting
About This Appendix
This appendix provides information about module diagnostics, and about
troubleshooting with the following indicators:
•Module status
•Network status
• Standard digital I/O status (ON/OFF/fault or diagnostic)
•IO-Link status
In addition, the following troubleshooting scenarios are provided:
• Second Data I/O connection rejected
• Controller goes to fault when enabling/disabling Unicast
• Generic device with zero length input and output is accepted by the
Add-on Profile
• The ChxMostRecentEvent.EventSequenceCount is an unsigned value
About Module Diagnostics
All status and diagnostic information is reported back over the network
communication adapter.
A single point of failure is detected and reported at the module and to the
control system.
Node-level diagnostics:
• Module Status indicator
indicates the health of the
module.
• Network Status indicator
indicates the status of the
communication link.
• SIO point indicator
indicates I/O (ON/OFF or
fault/diagnostic) status.
• IO-Link indicator indicates
the status of each IO-Link.
Module Status
Network Status
7
1
3
0
2
Module
Status
Network
Status
24V DC
SIO
IO
LINK
1734-4IOL
1
3
0
2
1
3
0
2
NODE:
NODE:
IO-Link State
Standard Digital I/O State
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