Accessing service port command interface in devices with Modbus output - HMD110 - HMD112 - HMS110 - HMS112 - HMW110 - HMW112 - TMD110 - TMI110 - TMW110

HMDW110 with TMI110 User Guide
Document code
M211726EN
Revision
F
Language
English
Product
HMD110
HMD112
HMS110
HMS112
HMW110
HMW112
TMD110
TMI110
TMW110
Document type
User guide
Follow the steps below to connect to the serial line with a transmitter with Modbus output. You can also use the procedure to retrieve the communication settings of your device, if you do not know them. You must use the Vaisala USB cable (Vaisala order code: 219690) for the connection.
  • Computer with
    • Windows operating system
    • Terminal application
    • Free USB port
    • Driver for Vaisala USB cable installed
  • Vaisala USB cable for computer connection (219690)
  1. Connect the USB cable to the PC and install the driver, if necessary. Do not connect the cable to the transmitter yet.
  2. Open the terminal program and open a connection to the corresponding COM port using the default settings 19200, 8, N, 1, no flow control.
  3. Keep the Enter key pressed down and connect the other end of the USB cable to the transmitter. This will cause the transmitter to start in serial mode, using the default serial settings.

    You can now use the transmitter with the terminal program.

To prevent Modbus mode from being restored on the next power-up, select a different serial mode with the smode command.