Rosemount 5300/5400 Series
Manual Supplement
Using a Field Communicator to change communication parameters
Modbus RTU Communication Setup
Table
NOTE
To change Modbus communication parameters, the Rosemount 5300/5400 must use HART address 1, the default address.
NOTE
After changing communication parameters, disconnect the Field Communicator and wait up to 60 seconds for the change to take effect.
The Modbus communication parameters can be changed by entering a text string in the HART Message parameter. See separate sections below for details regarding each Modbus protocol and what strings to use.
When using the Field Communicator, the Message Area is reached using HART command [2,2,1], and then selecting Message (menu item 11 for Rosemount 5300 and menu item 10 for Rosemount 5400).
The Rosemount 5300/5400 is configured with the default Modbus RTU address 246, and with the following Modbus RTU communication parameter default settings:
Parameter | Default Value | Configurable Values | |
Baud Rate | 9600 | 1200, 2400, 4800, 9600, 19200 | |
Start Bits(1) | One | One | |
Data Bits(1) | Eight | Eight | |
Parity | None | None, Odd, Even | |
Stop Bits | One | One or Two | |
Address | 246 | ||
range | |||
|
| ||
|
|
|
(1) Start Bits and Data Bits cannot be changed.
Table
To reset the communication parameters to default Modbus RTU settings, use the following Modbus Message:
HMC
Modbus RTU Parameter Configuration Example
You want to use address 44 for the 5300/5400 transmitter, and the following communication parameters are used by the host:
Parameter | Value |
Baud Rate | 4800 |
Start Bits | One |
Data Bits | Eight |
Parity | Odd |
Stop Bits | Two |
|
|