The document describes how to make FW update MODBUS RTU sensors using Teracom TCW210-TH, TCW260 or TCG140 controllers.
For proper update follow the steps below:

1. Connect the sensor which should be updated to the RS-485 bus.

It is important that only this sensor is connected to the RS-485 bus of the controller.

2. Type in the address bar:

  • For TCW210-TH and TCW260 – http://IP-address-of-controller/teracom485.htm;
  • For TCG140 – http://localhost:24111/teracom485.htm.

3. Press the “Scan” button.

After a successful scan, “Current address”, “Sensor Info” and “ID” will be updated.
update-modbus-rtu-sensors-1

4. Press “Choose file” and select the new firmware.

update-modbus-rtu-sensors-2

5. Click on “Upload”.

6. Set the sensor in update mode.

Disconnect the RS-485 cable of the Modbus RTU sensor.
Press and hold the button “config” of the sensor.
While the button is pressed, connect the RS-485 cable.
Immediately after the “Status” LED is on release the button.
In the next 3 seconds press the button 3 times to enter in the update mode.
If the sensor is successfully entered in update mode after these 3 seconds the LED is permanent on.
1-wire-barometric-pressure-sensor-tsp200-gal-1-s

7. Click on “Update”.

This will start the update procedure.
update-modbus-rtu-sensors-3

8. Operation completed.

After a successful update, Status is “Operation completed”.
update-modbus-rtu-sensors-4

We recommend regular check for new FW version and update MODBUS RTU sensors you are using