Ams trex™ Device Communicator

Related information
Status when detecting a device
3.6
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.
User Guide 
Field Communicator application
September 2021
User Guide 
57

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If the device connection wizard completes its process and cannot connect to the device, a
message is displayed. Tap 
Cancel
to return to the 
Connect - Select
screen to retry the
connection process.
Note
The selections are not saved in the device connection wizard. You need to select the
desired options each time you connect to a device.
Note
If you tap Back during the device connection wizard, the change you made on that screen
is canceled and the previous screen is displayed. For example, if you enabled the Trex unit
to provide power and changed the polling address from 0 to 63 and then tapped the Back
button, the polling address is set to the default value of 0, but the Trex unit still powers the
device. You can also tap Back to return to a previous question and provide a different
answer/selection.