Thermo Scientific AquaSensors™ DataStick™ Modbus ...

3.5 Restoring Default Slave Address, Baud Rate, and Parity
In the event that the slave address, Baud rate, and parity of a Modbus Communications Adapter is
unknown, its communications settings can be restored to factory default values by following the
procedure below:
Pin 1
Pin 2
Pin 5 Pin 9
Figure 1: The pin numbering of the DataStick-end of the Adapter.
1. Disconnect the Adapter from the network. Attention: Determine how your control system
will respond before disconnecting an Adapter from the network.
2. Detach the Adapter from the DataStick.
3. Make an electrical connection between pins 5 and 9 on the DataStick-side of the Adapter using a
clip lead or equivalent as shown in Figure 1. Be careful to make the connection only between
pins 5 and 9.
4. Apply power to the Adapter and wait at least 10 seconds.
5. Disconnect the power from the Adapter and remove the electrical connection between pins 5 and
9. Re-attach the Adapter to the DataStick.
6. Establish communications with the Adapter using a protocol of Modbus RTU, a slave address of
1, a Baud rate of 19.2 kbps, and a parity of odd.
Thermo Scientific AquaSensors DataStick Modbus Communications User Guide 8