Emerson AMS Trex Device Communicator User Manual page 57

User Guide
3.6
User Guide
1.800.561.8187
Option
Communication Status
HART
HART Offline
Fieldbus
Fieldbus Offline
To return to the Connect - Select screen from a device screen, press Menu → Disconnect.
Related information
Status when detecting a device
Device connection wizard
If the Trex unit cannot automatically detect or connect to the device, tap HART or Fieldbus
on the Connect - Select screen to start the device connection wizard. The wizard displays a
set of questions to help you connect to the device. You may see one or more of the
questions below depending on the setup of your device. The questions may appear in a
different order than listed below.
• Do you intend to provide power from the Trex unit? (This is available only if the Device
Communicator Plus communication module is attached to the Trex unit.)
• Is the Trex unit connected to a transmitter or a positioner?
• Do you want to change the polling options?
• Do you want to increase loop resistance? (This enables the internal resistors.)
• Do you want to increase loop current? (This is available for only positioners.)
In the Field Communicator application, the device connection wizard is the only way to
enable the Trex unit to power a device, change the polling options for HART and fieldbus,
enable the internal resistors within the Trex unit, or increase current to positioners.
www.
Field Communicator application
Description
Detect if a connected device is communicating with the Trex
unit.
Connect to a live HART device. Tap this option if the Trex unit
could not automatically detect or connect to the device. The
device connection wizard is displayed.
Simulate a connected HART device to become familiar with
the menus before configuring the device in a critical
environment. This option does not require communication
with a device.
Connect to a live FOUNDATION fieldbus device. Tapping
Fieldbus starts the Trex unit's communications if external
power is detected, and the Trex unit assumes the role of
network master (LAS), if no other master exists. The device
connection wizard is displayed. (The Fieldbus option is
displayed only if Trex unit is licensed for FOUNDATION
fieldbus.)
Simulate a connected FOUNDATION fieldbus device to
become familiar with the menus before configuring the
device in a critical environment. This option does not require
communication with a device. (The Fieldbus Offline option is
displayed only if Trex unit is licensed for FOUNDATION
fieldbus.)
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September 2021
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