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© 2020 All rights reserved. Data subject to change without notice.
LPT-M - Operation Manual
Rev. B | 2020.11
6.7 Modbus® Settings
The LPT-M transmitter operates on a local area network (LAN) using Modbus® RTU RS-485 serial
communications. Complete systems (controller with digital transmitters and peripherals) will be
shipped pre-confi gured with the appropriate Modbus® ID and baud rate.
In order for communication to be successful between devices, be sure your network connection is
complete, the network termination switches are set appropriately and all the devices are confi gured
with the same baud rate, character format, etc. Each device will have its own unique Modbus® ID.
Individual transmitters being added to an existing system may require changes to the default
Modbus® settings.
6.7.1 Change Modbus® ID
If required, you can change the Modbus® ID assigned to an LPT-M transmitter. In the Hardware
Confi guration Menu (passcode 1001), press either ARROW to scroll through the menu and select
Modbus®.
Press ENTER and use the ARROW keys to change the ID number. Move to the next digit by pressing
ENTER. When fi nished, press ENTER to save and Exit.
6.7.2 Change Baud Rate
All devices on the same network must have the same baud rate. The default Modbus® baud rate
for all CETCI Modbus® devices is 19,200. If you need to change the baud rate, in the Hardware
Confi guration Menu (passcode 1001), press either ARROW to scroll through the menu and select
BAUD.
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