EtherNet/IP (Diagnostics)

The EtherNet/IP Diagnostics page contains this information. You can refer to EtherNet/IP Settings for information about changing EtherNet/IP parameter values. If you want detailed information about the EtherNet/IP interface and the IO-Link Master, see the IO-Link Master EtherNet/IP Reference Manual.

Click the PAUSE LIVE UPDATES button to pause the diagnostic data collection. Click the RESUME button restart the data collection.

Click the RESET STATISTICS button to reset the values and gather the latest statistics.

Parameters	EtherNet/IP Diagnostic Descriptions
Active Session Count	The number of active EtherNet/IP sessions. A session can: Support both Class 1 I/O and Class 3 Messages Can be initiated by either the PLC or the IO-Link Master Can be terminated by either the PLC or the IO-Link Master
Active Connections	The current number of active connections (both Class 1 and 3).
Total Connections Established	The total number of connections that have been established.
Connection Timeouts	The number of connections that have closed due to timing out.
Connections Closed	The number connections that have closed due to a standard processes.
Class 3 Messages/Responses Received	The number of Class 3 messages and responses received from the PLC(s).
Broadcast Messages Received	The number of broadcast messages received from PLC(s).
Class 3 Messages/Responses Transmitted	The number of Class 3 messages and responses sent to the PLC(s).
Class 1 Output Updates (From PLC)	The number of Class 1 output data updates received from the PLC(s).
Class 1 Output Data Changes (From PLC)	The number of changes in Class 1 output data received from the PLC.
Class 1 Input Data Updates (To PLC)	The number of Class 1 input data updates sent to the PLC(s).
Client Object Requests	The number of Class 3 requests to the IO-Link Master vendor specific objects.
Good Responses from PLC	The number of good responses from messages sent to PLC(s).
Bad Responses from PLC	Displays the number of bad responses from messages sent to the PLC(s). Bad responses are typically returned for such errors as: Incorrect tag or file names Incorrect tag or file data types Incorrect tag or file data sizes PLC is overloaded and cannot handle the amount of Ethernet traffic PLC malfunction
No Responses from PLC	Displays the number of no responses from messages sent to the PLC(s). No responses are typically returned for such errors as: Incorrect IP address Incorrect PLC configuration PLC malfunction PLC is overloaded and cannot handle the amount of Ethernet traffic
Invalid Network Paths	Displays the number of network path errors on messages sent to the PLC(s). These are typically caused by incorrect IP address settings.
Pending Request Limit Reached	Displays the number of pending request limit errors. These errors occur when the PLC is sending a continuous stream of messages to the IO-Link Master faster than the IO-Link Master can process them.
Unexpected Events	Displays the number of unexpected event errors. Unexpected event errors occur when the IO-Link Master receives an unexpected message from the PLC such as an unexpected response or unknown message.
Unsupported CIP Class Errors	Displays the number of unsupported CIP class errors. These errors occur when a message that attempts to access an invalid class is received by the IO-Link Master.
Unsupported CIP Instance Errors	Displays the number of unsupported CIP instance errors. These errors occur when a message that attempts to access an invalid instance is received by the IO-Link Master.
Unsupported CIP Service Errors	Displays the number of unsupported CIP service errors. These errors occur when a message that attempts to access an invalid service is sent to the IO-Link Master.
Unsupported CIP Attribute Errors	Displays the number of unsupported CIP request attribute errors. These errors occur when a message that attempts to access an invalid attribute is sent to the IO-Link Master.
Unsupported File Errors	Displays the number of messages from SLC/PLC-5/MicroLogix PLCs that attempt to access an unsupported file address.
System Resource Errors	Displays the number of system resource errors. These errors indicate a system error on the IO-Link Master such as operating system errors or full message queues. These errors typically occur when the PLC(s) are sending messages to the IO-Link Master faster than the IO-Link Master can process them.
First Error String	Text description of the first error that occurred.
Last Error String	Text description of the last error that occurred.
*EtherNet/IP Port Specific Diagnostics*
Configuration Errors	Displays the number of improper configuration errors. These errors occur when the IO-Link Master receives a message that cannot be performed due to an invalid configuration.
Invalid Data Errors	Displays the number of invalid message data errors. These errors occur when the IO-Link Master receives a message that cannot be performed due to invalid data.
Active PDO Controller(s)	Lists the controller interface(s) type, (Class 1 or Class 3), and IP address that are controlling the PDO data.
PDO Writes to Offline or Read-Only Ports	Displays the number of PDO write messages that were dropped due to any of the following: The port is configured in IO-Link mode: There is no device connected to the port. The IO-Link device is off-line. The IO-Link device does not support PDO data. The PDO Transmit Mode (To PLC) is disabled. The port is configured in Digital Input mode.
Undeliverable PDI Updates (To PLC)	Displays the number of PDI update messages that could not be delivered to the PLC in the Write-to-Tag/File method. Undeliverable updates may result when: The IO-Link Master cannot complete an Ethernet connection to the PLC. The PDI data is changing faster than the Maximum PLC Update Rate.
ISDU Request Msgs from PLC(s)	Displays the number of ISDU request messages received from the PLC(s) or other controllers. These request messages may contain one or multiple ISDU commands.
ISDU Invalid Requests	Displays the number ISDU requests received over EtherNet/IP with one or more invalid commands.
ISDU Requests When Port Offline	Displays the number of ISDU requests received over EtherNet/IP when the IO-Link port was offline. This can occur when: The IO-Link port is initializing, such as after start-up. There is no IO-Link device attached to the port. The IO-Link device is not responding. Communication to the IO-Link device has been lost.
Valid ISDU Responses From Port	Displays the number of valid ISDU response messages returned from the IO-Link port interface and available to the PLC(s). The response messages contain results to the ISDU command(s) received in the request message.
ISDU Response Timeouts	Displays the number of ISDU requests that did not receive a response within the configured ISDU Response Timeout.
Unexpected ISDU Responses	Displays the number of unexpected ISDU responses. Unexpected responses may occur when an ISDU response is received after the ISDU request has timed out. This typically requires setting the ISDU Response Timeout to a longer value.
Maximum ISDU Request Msg Response Time	Displays the maximum time period required to process all commands within an ISDU request message. The response is not available until all ISDU command(s) contained in the request have been processed.
Average ISDU Request Msg Response Time	Displays the average time period required to process the ISDU request message(s). The response is not available until all ISDU command(s) contained in the request have been processed.
Minimum ISDU Request Msg Response Time	Displays the minimum time period required to process all commands within an ISDU request message. The response is not available until all ISDU command(s) contained in the request have been processed.
ISDU Read Commands	Displays the number of ISDU read commands received over EtherNet/IP.
ISDU Write Commands	Displays the number of ISDU write commands received over EtherNet/IP.
ISDU NOP Commands	Displays the number of ISDU NOP (no operation) commands received over EtherNet/IP.