Specifications

Table Of Contents
68
Reference Manual
00809-0100-4026, Rev HA
Section 4: Electrical Installation
November 2014
Electrical Installation
Note
Take the following into consideration if there are multiple Rosemount 5400 Modbus units on the
bus:
By default, the transmitters have HART address 1. It will not be possible to establish
communication on HART address 1 if several transmitters have the same address. In this case,
there are alternative solutions to establish communication:
1. Select the Scan by Tag option in the Search Device window in RRM and enter the HART
Device Tag of the transmitter. Communication can now be established with an
individual transmitter even if several devices have the same HART address.
2. Make sure the Rosemount 5400 transmitter is alone on bus. Disconnect or turn off
power from any other dcevies.
4.11.2 Connect to the HART terminals
To configure the Rosemount 5400 transmitter, connect the communicator or PC to the HART
terminals using a HART modem, see Figure 4-16 on page 62. Both the configuration tool and
the RS-485 bus can be connected simultaneously. Configuration data is sent with HART
commands through the HMC to the Rosemount 5400 transmitter electronics.
Note that the power supply must be connected during configuration, see also Connecting the
transmitter” on page 47.
Note
Measurement data is not updated to the Modbus Master when a configuration tool is
connected.