USB port capture - Metasys - LIT-12013150 - System Integration - Modbus Vendor Integration - 10.1 - 9.0.7

Network Engine Commissioning for Modbus Vendor Integration Application Note

Product name
Modbus Vendor Integration
Document type
Application Note
Document number
Revision date

About this task

Note: USB port capture is available only for NAE85s at Release 10.0 or higher.


  1. Insert a USB flash drive into the USB port on the NAE85. Wait two minutes for the flash drive to initialize.
  2. Drag the Modbus integration object from the navigation panel to the display panel, and click the Hardware tab.
  3. Click Edit, and then click the browse button to open the Vendor Configuration Data parameter list. In the Modify List dialog box:
    • Set parameter 7 to Y (yes) or A (advanced).
    • Set parameter 9 to the drive letter assigned to the USB flash drive.
    See Figure 1 for an example.
    Figure 1. USB port diagnostic example

  4. Click OK to save your changes, close the dialog box, and then click Save on the Hardware tab to save the Modbus integration object. Diagnostic mode begins.
  5. Capture data for approximately 10 minutes, then disable diagnostic mode by again opening the Vendor Configuration Data parameter list. Set parameter 7 to N (No) and save the change. The debug capture file is stored to the flash drive. The name of the text file is ModbusDriver_TCP‑<year><month><day>T<hour><minute><second>.log.

    Example: ModbusDriver_TCP-20181004T144500.log.

  6. Remove the flash drive from the USB port.
  7. Analyze the log file with a text editor. The log file includes all the information related to the integration and communication traffic, in hexadecimal format. For help with system diagnostic, the System Integration Team has a Modbus diagnostic guide that you can download from the Johnson Controls employee portal at