Comtrol DeviceMaster EtherNet/IP-Modbus EIP-MOD User Manual page 93

Serial Communication Statistics Page
Framing Error Count
Overrun Error Count
Dropped Message/Response
Count
Invalid Modbus Message/
Response
Count
Device Timeouts
Blocked Write Messages
DeviceMaster EIP-MOD User Guide: 2000664 Rev. A
Serial Communication Statistics Page (Continued)
Displays the number of framing errors received on the serial port.
Typically occurs due to an incorrect baud rate or stop bit setting.
Displays the number of overrun errors received on the serial port. This
typically occurs to one of the following events: incorrect flow control,
incorrect baud rate, incorrect data size, or incorrect stop bit setting.
Displays the number of messages or responses dropped to any of the
following:
• Incomplete message or response.
• Did not receive valid start and/or end characters (Modbus/ASCII
only).
Displays the number of invalid messages or responses received to any of
the following events:
• Message received after the timeout period. This may require
increasing the Device Response Timeout.
• Incorrect device ID in response message.
• Incorrect function code in response message.
Displays the number of device timeouts that occurred when there was no
response for a Modbus message.
Displays the number of Modbus write messages that were not
transmitted as a result of the Disable Writes (Read Only) option being set.
Chapter 8. Diagnostic Menus - 93