RSTi-OM User Manual
Section 9
GFK-3212A
Jun 2021
PROFINET IO Reference Information
100
Modbus/TCP Diagnostics
ISDU Requests When Port
Offline
Displays the number of ISDU requests received over
Modbus/TCP 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 Modbus/TCP.
ISDU Write Commands
Displays the number of ISDU write commands received
over Modbus/TCP.
ISDU NOP Commands
Displays the number of ISDU NOP (no operation)
commands received over Modbus/TCP.
9.4
OPC UA Diagnostics Page
The OPC UA Diagnostics page displays status for OPC UA:
1.
Whether the OPC UA feature is enabled or disabled
2.
Number of TCP connections
Figure 83: OPC UA Diagnostics Page
Note: Not all models support OPC UA.
9.5
MQTT Diagnostic Page