Comtrol DeviceMaster EtherNet/IP-Modbus EIP-MOD User Manual page 102

Modbus/TCP and Serial Modbus Master Statistics Page
Modbus/TCP and Serial Modbus Master Statistics Page (Continued)
Remote Modbus/TCP Device
Timeouts
Unexpected Responses From
Modbus/TCP Slave(s)
Error Responses from Modbus/
TCP Slave(s)
Unexpected Response Function
Codes From Modbus/TCP
Slave(s)
Invalid Response Protocol Types
From Modbus/TCP Slave(s)
Failed Modbus/TCP Connection
Attempts to Modbus/TCP
Slave(s)
Modbus/TCP Connection
Problems
Unexpected Dropped
Connections
102 - Chapter 8. Diagnostic Menus
Displays the number of messages to remote devices that were
determined to have timed out by this gateway.
Displays the number of responses received when no response was
expected.
Displays the number of responses received from Modbus/TCP slaves
with errors indicated. This may be caused by such things as:
• Device timeouts detected by slave Modbus/TCP device, such a
gateway.
• Invalid device address.
• Invalid device ID.
• Invalid message data.
Displays the number of unexpected response function codes from
Modbus/TCP slaves. This occurs when a response was received with a
different function code than what was sent.
Displays the number of responses with invalid protocol errors. This
occurs when a response is returned with a protocol other than the
Modbus/TCP protocol value of zero.
Displays the number of failed Modbus/TCP connection attempts to the
specified PLC IP address.
Displays the number of Modbus/TCP connection attempt problems.
This occurs when the device responds and the connection is made, but
there are problems setting up the connection options.
The possible option problems include:
Setting the TCP connection to TCP_NODELAY.
•
Setting the socket connection to SO_OOBINLINE.
•
Setting the socket connection to SO_KEEPALIVE.
•
Displays the number of Modbus/TCP connections that were
unexpectedly dropped.
DeviceMaster EIP-MOD User Guide: 2000664 Rev. A