Online Hart Devices; Hart Icons - Emerson AMS Trex User Manual

Field Communicator application
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Related information
3.14

Online HART devices

3.14.1

HART icons

When the Trex unit communicates with a HART device, one of the following icons appears
in the status bar at the top of the screen. The icon shows the status of the communication.
Icon
82
Open the Field Communicator application.
The Trex unit may automatically detect or connect to the device.
If the Trex unit does not automatically connect to the device, tap HART and do the
following:
a. Tap No when asked if you want to provide power from the Trex unit.
b. Select Transmitter or Positioner.
c. Follow any additional prompts.
You may see additional prompts if the Trex unit cannot connect to the device.
For example, you may be prompted to review the polling address if the device is
not at address zero, or to increase loop resistance. The Online menu or the
device dashboard displays, depending on the device type.
d. Tap the device displayed on the Device List.
To disconnect a device, tap Menu > Disconnect, or remove the lead set.
Wiring diagrams for HART devices and the Field Communicator application
Wiring diagrams for the Smart Wireless THUM
application
Disconnect a device
HART communication terminals
Internal resistors
Description
The Trex unit is communicating with a live, online HART device.
The Trex unit is communicating with a HART loop with a device in burst
mode. Burst mode is a communication mode in a HART transmitter to send
data at regular intervals.
The Trex unit is running in shout/deaf mode, which helps it communicate
with a device when it is on a noisy HART loop.
The Trex unit is running in shout/deaf mode and communicating to a HART
loop with a device in burst mode.
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Adapter and the Field Communicator
User Guide