Restoring serial port settings - WMT700

WMT700 Series User Guide
Document code
M211095EN
Revision
K
Language
English
Product
WMT700
Document type
User guide
If you do not know the configured settings of WMT700, or the settings have been accidentally changed, you may not get any response when you type the OPEN command. In that case, restore the serial port settings to known values.
  1. Connect a cable between your terminal computer, power supply, and WMT700.
  2. Open the HyperTerminal program.
    You can also use other terminal programs, such as Tera Term.
  3. Cancel the new connection.
  4. Select File > Properties.
  5. Select the correct COM port and then Configure.
  6. Regardless of the configured port settings of WMT700, select the following communication settings:
    • Bits per second: 19200
    • Data bits: 8
    • Parity: None
    • Stop bits: 1
    • Flow Control: None
  7. Close the New Connection Properties window.
  8. Connect to WMT700 using the RS-485 interface.
  9. Switch the sensor power supply off and back on.
  10. Press # on your keyboard and hold down the key for at least 5 seconds. WMT700 responds with the following string: 
    Ok
Restoring COM1 and COM2 settings…
    Updating the settings is completed in a few seconds. When the operation is done, WMT700 sends the following response:
    Done. Rebooting…
    WMT700 has applied the settings and reboots using the new settings. For the restored settings, see the table below.
  11. Before you start configuring new values to WMT700, apply the new settings to HyperTerminal. To close the connection, select Call > Disconnect.
  12. Select File > Properties.
  13. Select Properties > Configure.
  14. In Bits per second, select 9600.
  15. Close the Properties window.
  16. Select Call > Call.
    Table 1. Restored serial port settings
    Parameter name Default value Description

    com1_baud

    com2_baud

    		 4 4 = 9600 bauds per second

    com1_data

    com2_data    		 8 Number of data bits

    com1_delay

    com2_delay    		 20 Response delay in milliseconds
    com2_interf 0 0 = RS-485

    com1_parity

    com2_parity    		 0 0 = None

    com1_protocol

    com2_protocol    		 0 WMT700 protocol

    com1_stop

    com2_stop    		 1 Number of stop bits

    The serial port settings are now restored to known values. You can type the OPEN command and start configuring WMT700.