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Chapter
7
Operating Instructions
Flexi Classic Gateways
62
© SICK AG • Industrial Safety Systems • Germany • All rights reserved
8011834/YT28/2016-03-15
Subject to change without notice
Modbus/TCP Ethernet Gateway
Entry
Description
Slave mode specific statistics
Messages Received From
PLC
Specifies the number of messages that were received from the PLC.
Responses Sent to PLC
Specifies the number of responses to the PLC.
Invalid Command Lengths
Specifies the number of received messages with invalid command
lengths.
Invalid Message Data
Errors
Specifies the number of received messages that led to an Invalid
Message Data Error. This error occurs when a message with invalid
data is received.
Unknown Request
Destination IDs
Specifies the number of received messages with unknown
destination IDs (Request Destination IDs).
Invalid Request Protocol
Types
Specifies the number of received messages that led to an Invalid
Protocol Error. This error occurs when a message does not contain
the value zero for the Modbus protocol.
Unsupported Modbus
Function Codes
Specifies the number of received messages with an unsupported
function code.
Master mode specific statistics
Messages Sent To PLC
Specifies the number of messages that were sent to the PLC.
Responses Received From
PLC
Specifies the number of responses from the PLC.
Invalid Response Data
Errors
Specifies the number of faulty response data that were sent to the
PLC upon request. Possible reasons include:
No data returned upon request of the digital output settings
Error responses
Specifies the number of responses from the PLC that contain error
messages. Possible reasons include:
Invalid configuration of the PLC address
Incorrect configuration of the PLC
Unexpected Response
Function Codes
Specifies the number of Unexpected Response Function Codes that
were received in a message in master receive mode or master send
mode. This error occurs when a message without the expected
function code is received.
Unknown Response
Destination IDs
Specifies the number of received messages with unknown destina-
tion IDs (Request Destination IDs). This error occurs when the PLC
responds to a message with an unknown destination ID.
Invalid Response Protocol
Types
Specifies the number of received messages that led to an Invalid
Protocol Error. This error occurs when a response does not contain
the value zero for the Modbus protocol.
Failed Modbus/TCP
Connection Attempts
Specifies the number of failed attempts to reach the specified PLC
address via the Modbus/TCP connection.
Tab. 68: Statistical data and
diagnostic data of the
interface to the PLC