Comtrol IOLM 4-EIP - Manual (Page 55)

IO-Link Master 4-EIP User Guide: 2000582 Rev. A Chapter 7. Using the Diagnostics Pages - 55
Modbus/TCP Diagnostics
Invalid Message Address
Errors
Displays the number of invalid message address errors. These errors occur
when the IO-Link Master receives a message that cannot be performed due
to an invalid address.
Unknown Device ID Errors
Displays the number of unknown device ID errors. These errors occur when
the IO-Link Master receives a message that is addressed to a device ID
other than the configured Slave Mode Device ID.
Invalid Protocol Type Errors
Displays the number of invalid message protocol type errors. These errors
occur when the IO-Link Master receives a Modbus/TCP message that
specifies a non-Modbus protocol..
Unsupported Function Code
Errors
Displays the number of invalid Modbus function code errors. These errors
occur when the IO-Link Master receives a message that cannot be
performed due to an unsupported Modbus function code.
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.
No Available Connection
Errors
Displays the number of Modbus/TCP connection attempts that were
rejected due to no available connections. This occurs when the number of
Modbus/TCP connections has reached the limit.
System Resource Errors
Displays the number of system resource errors. These errors indicate a
system error on the IO-Link 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.
Modbus/TCP Port Specific Diagnostics
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.
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 of ISDU requests received over Modbus/TCP with one
or more invalid commands.
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.
Modbus/TCP Diagnostics (Continued)