ABB LWT300 Series User Manual page 73

—
Figure 49 Pulling out the HMI board
4 On the communication board, set dip switches 3 and 4 to position 1 (see Figure 50). Your LWT
instrument is now ready to be configured via your preferred software tool.
—
Figure 50 Modbus communication board
Dip switches

ON
1
1
0
PROTOCOL MODE
1
ENABLE
DISABLE
0
For more information on the configuration setup that you need to start communicating with your
instrument, see "Configuring the LWT300 with a computer" on page 60.
NOTICE
When you are done configuring the instrument remotely via HART, you must toggle the
communication mode back to Operation (switches 3 and 4 to position 0); otherwise the
instrument will not be able to resume sending data when reconnected to the Modbus
network.
1
0
2 3 4
P/N : 3KXL001060U0400
NV FORMAT
ENABLE
DISABLE
CONFIG / HART-RS485
OPERATE / MODBUS
TM
MODBUS
Communication board
HMI board
Configuration
HART/RS485
Operation
Modbus
Configuring communications
69