Configuring communications 71
Setting the swap mode
In the LWT300 Modbus communication, the default byte order for the floating point format is CDAB.
Should you need to change this byte order:
1 Select Communication > Modbus > Swap Mode.
2 Press Edit. A list of byte orders appears (ABCD, CDAB, DCBA, BADC)
3 From that list, select the appropriate byte order and press OK.
Configuring HART communication
HART communication is only used in the LWT300 for remote configuration via your preferred software
tool.
NOTICE
The LWT series MODBUS/HART FDI package is required to communicate via HART. You
can download it from https://new.abb.com/products/measurement-products/level/
guided-wave-radar-level-transmitters/lwt300-series-guided-wave-radar.
Setting the HART network address
To set the instrument address so that it can be identified for configuration purposes with your
software tool:
1 Select Communication > HART > Device Address.
2 Press Edit.
3 Set an address between 0 and 63 and press OK. Your instrument can now be identified by your
software tool for configuration purposes.
Locating an instrument with tags
A tag is intended to simplify identifying the location of a LWT instrument on the network, in the plant, etc.
To create a tag for the instrument:
1 Select Communication > Tag.
2 Press Edit.
3 Set a tag name (see “Setting a value” on page 35) and press OK.
Browsing communication info
From the Communication menu, you can quickly browse through the various factory-set
communication parameters such as:
• The last command received
• The device ID
• The manufacturer ID
• The device type
• The device descriptor
• The device revision number
• The HART revision number
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