Diagnostics
Document No. D106-009
Page 68 of 76
Revision 1.15
Figure 5.11. – Modbus Packet Capture complete
The captured Modbus packets are tabulated as follows:
Statistic
Description
Index
The packet index, incremented for each packet sent or received.
Time
The elapsed time since the module powered up.
Status
The status of the packet. Received packets are checked for valid Modbus
constructs and valid checksums.
Dirn
The direction of the packet, either transmitted (Tx) or received (Rx).
Node
Modbus node address of the message destination.
Description
A brief description of the packet, showing the function and register range if
applicable.
Data
The raw packet data.
Table 5.7. – Modbus Packet Capture fields
The packet capture can be saved to a file for further analysis, by selecting the Save button on
the toolbar. Previously saved Modbus Packet Capture files can be viewed by selecting the
Modbus Packet Capture Viewer option in the tools menu.