How it Works
Emerson Electric Co
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TREXLFPNA9P3
User manual
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Emerson Electric Co TREXCFPNAWS3, TREXCHPNA9S3, TREXCHPKLWS3, TREXCHPKLWP3, TREXCFPKLWS1 User manual

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Page 1
AMS Trex™ Device Communicator
User Guide
User Guide
Rev 8
September 2021
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Copyright and trademark information
©
2021 Emerson. All rights reserved. FOUNDATION™, HART® and WirelessHART® are marks of the FieldComm Group of Austin, Texas, USA. The Emerson logo is a trademark and service mark of Emerson Electric Co. All other marks are the property of their respective owners.
Notice
Important
Read this manual before working with the Trex unit. For personal and system safety, and for optimum product performance, thoroughly understand the contents before using or servicing this product. For equipment service needs, contact the nearest product representative.
Important
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.
WARNING
If the Trex unit is used in a manner not specified by Emerson, the protection provided by the equipment may be impaired.
WARNING
Do not directly connect the ports or terminals on the Trex unit to any main line voltage.
WARNING
WARNING - POTENTIAL ELECTROSTATIC CHARGING HAZARD - SEE INSTRUCTIONS. AVERTISSEMENT - DANGER POTENTIEL DE CHARGES ÉLECTROSTATIQUES - VOIR INSTRUCTIONS
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User Guide Contents
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Contents

Chapter 1 AMS Trex Device Communicator User Guide...................................................................5
Chapter 2 AMS Trex Device Communicator overview..................................................................... 7
Chapter 3 Field Communicator application...................................................................................53
Chapter 4 Loop Diagnostics application......................................................................................125
Chapter 5 Fieldbus Diagnostics application................................................................................ 151
Appendix A Troubleshooting........................................................................................................ 179
Appendix B Technical specifications..............................................................................................183
Appendix C Product certifications................................................................................................. 189
Appendix D Wireless/Spectrum approvals.................................................................................... 191
Glossary .................................................................................................................................. 193
Index .................................................................................................................................. 197
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Contents User Guide
September 2021
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User Guide AMS Trex Device Communicator User Guide

September 2021
1 AMS Trex Device Communicator User
Guide

1.1 User Guide overview

The AMS Trex Device Communicator User Guide is written for instrument technicians who work with field devices, including HART® and FOUNDATION™ fieldbus devices. The user guide describes the hardware, connections to devices, the supported applications, and the diagnostics you can run on devices, 4-20 mA current loops, or FOUNDATION fieldbus segments.
Note
The Trex unit has two communication module options. This user guide describes both modules. Any differences in the procedures based on these modules are noted.

1.2 Documentation conventions

The following conventions are used throughout:
Note
A note paragraph contains special comments or instructions.
CAUTION
A caution paragraph alerts you to actions that can have a major impact on the equipment or stored data.
WARNING
A warning paragraph alerts you to actions that can have extremely serious consequences for equipment and/or personnel.

1.3 Technical support

Contact your local representative or go to the AMS Trex Device Communicator website for technical support contact information.

1.3.1 Information to provide to technical support

Before you call technical support personnel, have a detailed description of the issue, including the information below (if applicable). Ensure you have the user manual for the devices or digital control system available.
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Information about the Trex unit
• Operating system version on the Trex unit. (Tap Settings → About.)
• The serial number of the Trex unit. You can view the serial number from the Settings.
(Tap Settings → About → CPU Board Serial Number.) The serial number is located on the label on the bottom of the Trex unit, near the power module LEDs.
• Version number for the application. (Tap Settings → Installed Applications.)
Troubleshooting device communication issues
• Does the control system support HART® or FOUNDATION™ fieldbus communications?
• What is the manufacturer and model of the control system?
• What is the device manufacturer name (or ID) and model revision of the device (exact
spelling if possible)?
• What task is being performed when the communication problem occurs?
• Can AMS Device Manager or another Trex unit communicate with the device?
• Are you having communication problems with multiple devices?
• Are there any error messages displayed when attempting to communicate with a
device?
• Does communication work when certain devices or processes are not running?
• What is the total cable length run from the termination panel to the device?
When you are working with HART devices, answer the following questions:
• What is the loop impedance (resistance value) in the HART loop?
• If a HART multiplexer is being used, what is the manufacturer and model?
• Is the device in burst mode?
• Is the device address set to "0"?
• Is more than one device on the loop?
• Is another master (primary or secondary) on the loop? (For example, a control system
or multiplexer.)
• Is the device powered by the Trex unit or an external power supply?
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User Guide AMS Trex Device Communicator overview

September 2021
2 AMS Trex Device Communicator
overview
The Trex unit supports HART® and FOUNDATION™ fieldbus devices, so you can configure or troubleshoot in the field or on the work bench. Electronic Device Description Language (EDDL) technology enables the Trex unit to communicate with a variety of devices independent of device manufacturer.
Depending on the attached communication module, the Trex unit lets you:
• Configure HART and FOUNDATION fieldbus devices.
• Power one HART or FOUNDATION fieldbus device.
• Measure current and voltage.
• Perform diagnostics on a 4-20 mA current loop or FOUNDATION fieldbus segment.
The Trex unit includes a color LCD touchscreen, a Lithium-Ion power module (battery pack), a processor, memory components, and optional communication modules.
CAUTION
When the Trex unit communicates with devices, follow all standards and procedures applicable to the location. Failure to comply may result in equipment damage and/or personal injury. Understand and comply with the sections in this manual.

2.1 Precautions for the Trex unit

Before operating the Trex unit, ensure:
• The Trex unit is not damaged.
• The power module is securely attached.
• All screws are sufficiently tightened.
• The communication terminal recess is free of dirt and debris.
• The communication module is securely attached.
CAUTION
Do not use a screen protector on an IS-approved Trex unit. Static discharge is possible.

2.1.1 Hazardous areas

A Trex unit that meets the Intrinsic Safety requirements (IS-approved) can be used in Zone 1, or Zone 2, for Group IIC, and Class I, Division 1 and Division 2, Groups A, B, C, and D locations.
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An IS-approved Trex unit may be connected to loops or segments that are attached to equipment located in Zone 0, Zone 1, Zone 2, for Group IIC; Zone 20, Zone 21, Zone 22, and Class I, Division 1 and Division 2, Groups A, B, C, and D locations.
An IS-approved Trex unit can be ordered by selecting the KL option. The Trex unit has a label that lists the approvals.
CAUTION
Do not use a screen protector on an IS-approved Trex unit. Static discharge is possible.
WARNING
Do not install, remove, or charge the Lithium Ion (Li-Ion) power module in a hazardous area environment.
WARNING
Explosions can result in serious injury or death.
Use in an explosive environment must be in accordance with the appropriate local, national, and international standards, codes, and practices. Please review the Technical specifications and Product certifications sections of the AMS Trex Device Communicator User Guide for any restrictions associated with safe use.
Electrical shock can result in serious injury or death.
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2.2 Front view of the Trex unit

Figure 2-1: Front view
A. Micro USB port (top)
B. Power button (side) C. Strap connectors (side) D. Touchscreen
E. Keypad
F. Charger port for the AC adapter (side)
Related information
LEDs on the power module Touchscreen

2.2.1 Keypad

The Trex unit has a keypad that lets you navigate and select menus options. Use the four arrow buttons to move across all selectable options on the screen, and use the checkmark button to select an option.
The keypad also lets you enter text or numbers, based on the selected option or menu. An onscreen keyboard is displayed. The four arrows let you navigate to a letter, number, or symbol on the keyboard. Press the checkmark button or X button to select the option.
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Figure 2-2: Keypad
A. Cancel any unsaved changes or close a menu. Similar to a Back button.
B. Move through the menus and icons in the applications. Press the up, down, right, and
left arrow keys to highlight a menu option on a screen. The right and left arrow keys also select items in a grid or on a graph, but they do not let you navigate to the next level in a menu.
C. Open a menu item or accept any updates. Similar to an Enter button.

2.3 Touchscreen

The Trex unit has a resistive touchscreen that lets you select menu items and enter text. Firmly press the screen to select an item. You need to apply more pressure than you would for smart phones and tablets. If the touchscreen seems inaccurate, you can re-calibrate it. All instructions in this manual are written for the touchscreen.
The touchscreen supports basic gestures, such as scroll up and scroll down. Multi-touch gestures, such as pinch, are not supported.
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CAUTION
The touchscreen display on the Trex unit could be damaged if directly impacted. To avoid damaging the touchscreen:
• Use the Trex carrying case with the faceplate closed to protect the touchscreen and
prevent any damage when transporting or carrying the Trex unit.
• Do not let the touchscreen come in contact with other objects.
• Contact the touchscreen with blunt items only. Sharp instruments, such as
screwdrivers, can damage the touchscreen.
Repairing the touchscreen requires replacement of the entire display assembly, which is possible only at an authorized service center.
CAUTION
Do not use a screen protector on an IS-approved Trex unit. Static discharge is possible.

2.3.1 Supported gestures

The Trex unit uses a single-tap to select an item on the screen. You do not need to double­tap an option on the screen.
Note
Multi-touch gestures, such as pinch, are not supported. Only single-touch gestures are supported.
Gesture Description
Tap. Tapping a menu item opens another menu. For example, you
can tap a device description in the Field Communicator application and a menu is displayed.
Press and hold. Some menu items have a context menu associated with them.
Pressing and holding a menu item will activate the context menu. For example, pressing and holding on a menu in the Field Communicator application brings up a context menu that allows access to help, or adding the item as a favorite.
Scroll down.
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Gesture Description
Scroll up.
Scroll right. Used to move right on graph or grid, or to view additional
columns/data on a screen.
Scroll left. Used to move left on graph or grid.

2.3.2 Enter text, numbers, or special characters

If an option requires you to enter text, the application displays a keyboard with the permitted characters. You can enter letters, numbers, punctuation, and special characters. Tap the screen or use the four arrows keys on the keypad to enter the desired characters. Tapping the Shift Key twice on the keyboard enables Shift Lock.
For screens that require passwords, text is hidden by default but can be revealed before confirming by tapping the reveal icon.

2.3.3 Clean the touchscreen

Clean the touchscreen with a soft cloth with pH-neutral detergent or alcohol. When the touchscreen is contaminated by chemicals, immediately wipe them off with caution to avoid injury to the human body.
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2.4 Back view of the Trex unit

You can access the communication module, the stand, and the power module.
Figure 2-3: Back view
A. Communication module
B. Stand
C. Power module
Related information
Communication modules Replace the stand Power module

2.4.1 Serial numbers

The Trex unit has a serial number for each part, including the main unit, power module, and communication module. The label on each part lists the serial number. You may need to provide a serial number if you work with technical support.
You can view the serial number from the Settings. (Tap Settings → About → CPU Board Serial Number.) The serial number is located on the label on the bottom of the Trex unit, near the power module LEDs.
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2.5 Communication modules

The Trex unit has two communication modules.
Device Communicator communication module
The Device Communicator communication module can connect to and communicate with HART and FOUNDATION fieldbus devices on an externally-powered HART loop or fieldbus segment. The Device Communicator communication module has unique terminals for both HART and FOUNDATION fieldbus devices.
Figure 2-4: Device Communicator communication module
A. Connect to externally-powered FOUNDATION fieldbus devices.
B. Connect to externally-powered HART devices.
Device Communicator Plus communication module
The Device Communicator Plus communication module can connect to HART and FOUNDATION fieldbus devices, measure current and voltage, and power a device.
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Figure 2-5: Device Communicator Plus communication module
A. Power a FOUNDATION fieldbus device. You need to connect the FOUNDATION fieldbus
Power Plug to the FF pwr and the positive FF terminals.
B. Connect to a FOUNDATION fieldbus device that is externally-powered or powered by the
Trex unit. C. Measure current on a 4-20 mA current loop. D. Power and connect to a HART device. The HART+pwr terminals can measure the current
output of a connected transmitter or control the current input to a connected positioner.
The terminals also have a loop resistor for device communication.
E. Connect to an externally-powered HART device. The HART terminals also have an
optional loop resistor for enabling HART communications on 4-20 current loop and
optional current control for moving a positioner.
CAUTION
• Before you insert or remove a communication module, ensure the Trex unit is powered
off.
• Ensure sufficient grounding. Ensure the personnel, working surfaces, and packaging
are sufficiently grounded when handling electrostatically sensitive parts.
• Avoid touching the pins on the connectors or components. Discharged energy can
affect the modules.
• When you insert/attach the communication module to the Trex unit, do not over
tighten the screws. Use 0.5Nm maximum torque load.
• Remove the USB cable from the Trex unit before connecting to a device.
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WARNING
• The Trex unit cannot power a 4-wire device. Do not connect Trex unit to the power
terminals of a 4-wire device. This can blow a fuse inside the Trex unit. The repair/ replacement will need to be completed at an authorized service center.
• Do not connect lead sets to the HART and HART + pwr terminals at the same time. If
the lead sets are connected to devices, this increases the chance of wiring mistakes and could create a short in the HART loop.
• Do not add any external power to the device when the Trex unit is powering the device.
This can blow a fuse inside the Trex unit. The repair/replacement will need to be completed at an authorized service center. Ensure the device is disconnected from the loop/segment and no other wires are connected to the device before providing power from the Trex unit.
• Do not use the Trex unit to power a WirelessHART device. Providing power to a
WirelessHART device may damage the device.
• Do not connect the mA terminals (ammeter) in parallel with a powered 4-20 mA
current loop. Ammeters have low resistance. This can disrupt the loop and cause devices to report incorrect values or positioners to move unexpectedly.
• Do not connect the mA terminals on the Trex unit to a power supply that is not current
limited to 250 mA. This can blow a fuse inside the Trex unit. The repair/replacement will need to be completed at an authorized service center.

2.5.1 Ammeter on the Device Communicator Plus communication module

The Device Communicator Plus communication module has several ammeters for reading current:
1. Ammeter in the mA terminals. This ammeter is intended for quick measurements and is for reference only.
2. Ammeter in the HART + pwr terminals. This ammeter is used when the Trex unit is powering a transmitter. This ammeter is intended for tasks including digital-to­analog trims where a higher accuracy ammeter is required.
3. Ammeter in the HART + pwr and HART terminals. This ammeter is used when the Trex unit is controlling current or is powering a positioner. The ammeter is intended to give feedback on the output current from the Trex unit and is for reference only.
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WARNING
• Do not use the HART + pwr and mA terminals in series when the Trex unit powers a
device.
• Do not connect the mA terminals (ammeter) in parallel with a powered 4-20 mA
current loop. Ammeters have low resistance. This can disrupt the loop and cause devices to report incorrect values or positioners to move unexpectedly.
• Do not connect the mA terminals on the Trex unit to a power supply that is not current
limited to 250 mA. This can blow a fuse inside the Trex unit. The repair/replacement will need to be completed at an authorized service center.
For best results when using the mA terminals, do the following:
• Avoid using the ammeter in cold or very hot temperatures. Extreme temperatures can
affect the accuracy of the measurements.
• Connect the mA terminals on the Trex unit to the "low-side" of the device. See the
example below.
Figure 2-6: "Low-side" ammeter connection
A. Analog output

2.5.2 Install a communication module

CAUTION
• Ensure sufficient grounding. Ensure the personnel, working surfaces, and packaging
are sufficiently grounded when handling electrostatically sensitive parts.
• Avoid touching the pins on the connectors or components. Discharged energy can
affect the modules.
• Handle the module with care. It is possible to bend the pins on the module's connector.
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Procedure
1. Turn off the Trex unit.
2. Place the Trex unit face down on a level, secure surface.
3. Place the communication module into the top of the Trex unit, and carefully align
the communication module with the connector on the Trex unit.
4. Gently press the communication module until it is seated properly with the Trex
unit.
5. Tighten the four screws using a screwdriver. Do not over tighten the screws. Use
0.5Nm maximum torque load.

2.5.3 Remove a communication module

CAUTION
• Ensure sufficient grounding. Ensure the personnel, working surfaces, and packaging
are sufficiently grounded when handling electrostatically sensitive parts.
• Avoid touching the pins on the connectors or components. Discharged energy can
affect the modules.
• Handle the module with care. It is possible to bend the pins on the module's connector.
Procedure
1. Turn off the Trex unit.
2. Place the Trex unit face down on a level, secure surface.
3. Remove any connected lead sets.
4. Loosen the four screws on the module using a screwdriver.
5. Gently lift the communication module straight away from the Trex unit. Do not
slide the communication module.
Figure 2-7: Trex unit with the communication module removed
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2.6 Power module

A rechargeable Lithium-Ion power module powers the Trex unit. A typical charge should last for more than 8 hours of continuous use. The Trex unit displays a low-battery warning when the remaining charge reaches a set level. Ensure you save any unsent data for a device before the power module reaches a low level.
You do not need to discharge or calibrate the power module. Contact technical support if you experience any problems with the power module.
WARNING
Do not install, remove, or charge the Lithium Ion (Li-Ion) power module in a hazardous area environment.

2.6.1 Precautions for the power module and AC adapter

Understand and follow the precautions below before using the power module or AC adapter.
• When transporting a Lithium-Ion power module, follow all applicable regulations.
• Ensure sufficient grounding. Ensure the personnel, working surfaces, and packaging
are sufficiently grounded when handling electrostatically sensitive parts.
• Avoid touching the pins on the connectors or components. Discharged energy can
affect the power modules.
• Protect the power module and AC adapter from moisture, and respect operating and
storage temperature limits listed in the AMS Trex Device Communicator User Guide. The AC adapter is for indoor use only.
• Do not cover the power module or AC adapter while charging. Do not subject them to
prolonged periods of direct sunlight, or place them on or next to heat-sensitive materials.
• Charge the power module with only the provided AC adapter. The AC adapter should
not be used with other products. Failure to comply may permanently damage the Trex unit and void the IS approval and warranty.
• Do not open or modify the power module or AC adapter. There are no user-serviceable
components or safety elements inside. Opening or modifying them will void the warranty and could cause personal harm.
• Clean the AC adapter by clearing the terminal of dirt and debris, if required.
• If the AC adapter is used in a manner not specified by Emerson, the protection provided
by the equipment may be impaired.
• The AC adapter comes complete with interchangeable plug heads for UK, USA, EU and
AU.
• The maximum operating altitude for the AC adapter is 2000 meters.
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2.6.2 AC adapter

The Trex unit includes an AC adapter for recharging the power module. The Trex unit is fully operational while the AC adapter charges the power module.
WARNING
Do not install, remove, or charge the Lithium Ion (Li-Ion) power module in a hazardous area environment.
Figure 2-8: AC adapter
Related information
Precautions for the power module and AC adapter

2.6.3 LEDs on the power module

The power module has six LEDs to indicate the charging status. Press the button next to the LEDs to illuminate the LEDs and view the current charge level.
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Figure 2-9: LEDs showing approximately 100 percent charge
A. AC adapter LED. Lights up when the AC adapter is attached to the power module. A
green light indicates the power module is fully charged. An orange light indicates the power module is charging. No LED indicates the power module is not being charged.
B. Power module LEDs. Each solid green LED indicates approximately 20 percent charge. A
blinking LED indicates the power module is charging within that 20 percent range.
C. Power module button. Press to illuminate the power module LEDs.

2.6.4 View the remaining power module charge

You can check the remaining power module charge from several places.
Procedure
1. Check the charge from the power module.
a) Press the power module button to illuminate the 5 LEDs.
b) View the LEDs. Each solid green LED indicates approximately 20 percent
charge.
2. Check the charge from the Trex Home screen.
a) Tap Settings or the status bar at the top of the screen.
b) Tap More → Power Management.
The charge level is displayed.
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Related information
LEDs on the power module Status bar

2.6.5 Charge the power module

Fully charge the power module before using it in the field. The Trex unit is fully operable when the power module is charging. An overcharge condition will not occur if the AC adapter is connected after charging completes. You can charge the power module when it is attached to or detached from the Trex unit.
To maintain performance, charge the power module frequently, preferably after each use. Limit full discharges, if possible.
If you experience communication issues when working with a device, remove the AC adapter from the Trex unit.
WARNING
Do not install, remove, or charge the Lithium Ion (Li-Ion) power module in a hazardous area environment.
Procedure
1. Plug the AC adapter into a power outlet.
2. Attach the AC adapter cable to the charger port on the lower left side of the Trex
unit. A full charge takes approximately three to four hours.

2.6.6 Install the power module into the Trex unit

CAUTION
• Ensure sufficient grounding. Ensure the personnel, working surfaces, and packaging
are sufficiently grounded when handling electrostatically sensitive parts.
• Avoid touching the pins on the connectors or components. Discharged energy can
affect the modules.
WARNING
Do not install, remove, or charge the Lithium Ion (Li-Ion) power module in a hazardous area environment.
Procedure
1. Place the Trex unit face down on a level, secure surface.
2. Align the power module with both sides of the Trex unit, and carefully place the
power module onto the Trex unit.
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3. Insert and tighten the four screws with a Torx® screwdriver to secure the power
module. Do not over tighten the screws. Use 0.5Nm maximum torque load.

2.6.7 Remove the power module from the Trex unit

CAUTION
• Ensure sufficient grounding. Ensure the personnel, working surfaces, and packaging
are sufficiently grounded when handling electrostatically sensitive parts.
• Avoid touching the pins on the connectors or components. Discharged energy can
affect the modules.
WARNING
Do not install, remove, or charge the Lithium Ion (Li-Ion) power module in a hazardous area environment.
Procedure
1. Turn off the Trex unit.
2. Place the Trex unit face down on a level, secure surface.
3. Use a Torx® screwdriver to loosen the four screws on the power module. The screws
do not need to be fully removed.
4. Gently lift the power module straight away from the Trex unit. Do not slide the
power module.
Figure 2-10: Trex unit with the power module removed

2.6.8 Maintain the power module

To help maintain the performance and life of the power module, understand and follow the guidelines below:
• Recharge the power module frequently, preferably after each use or at night. Limit the
number of full discharges, if possible.
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• Avoid frequent use at high temperatures because this can reduce performance.
• Use a dry location at or near room temperature when storing the power module for an
extended time. Prolonged storage at higher temperatures can reduce performance.
• Ensure the remaining charge level is at or near mid-capacity when storing for an
extended time. The remaining charge will slowly drain during storage. Periodically charge the power module to ensure the remaining charge does not drain to low levels.

2.7 Accessories

The Trex unit includes the following accessories:
• Lead set.
• A FOUNDATION fieldbus Power Plug to enable the Trex unit to power a FOUNDATION
fieldbus device.
• A USB cable to connect the Trex unit to PC applications.
• AC adapter.
• A handstrap that can be connected to either side of the Trex unit.

2.7.1 Cables and lead sets

The Trex unit comes with a lead set so it can connect to a device. The lead set attaches to one set of terminals on the top of the Trex unit. The positive lead is marked with a red band near the banana jacks.
Note
When you remove the lead set from the Trex unit, do not pull on the cable. Grab the plug/ connectors and remove the lead set from the terminals.
The Trex unit may also include the FOUNDATION fieldbus Power Plug, which is used to power one FOUNDATION fieldbus device. Use the FOUNDATION fieldbus Power Plug with the Device Communicator Plus communication module. The plug attaches to the FF pwr terminal and the positive FF terminal on top of the lead set.
Figure 2-11: FOUNDATION fieldbus Power Plug
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Figure 2-12: FOUNDATION fieldbus Power Plug attached to the Trex unit

2.7.2 Carrying case for the Trex unit

A carrying case is available for the Trex unit to hold it and store lead sets, the AC adapter, and other accessories. The case has several compartments and a shoulder strap.
When transporting or carrying the Trex unit in the case, ensure the face plate on the case is closed. This protects the touchscreen from unexpected contact with other objects.
Note
Ensure the carrying case is clean. Otherwise, this can affect the strength of the connection on the strap or faceplate. When carrying the Trex unit in high places, use the hand strap.
The bottom compartment on the carrying case opens so you can store the AC adapter with the Trex unit.
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Figure 2-13: The carrying case

2.8 Power on or off

Procedure
1. To power on, press and hold the power button on the upper left side of the Trex unit
for one second.
2. To power off, do one of the following:
• Quickly press the power button, and then tap Turn Off.
• Tap Settings or the status bar at the top of the screen, and tap More → Power
Management → Turn off.

2.8.1 Reboot

Procedure
1. Tap Settings or the status bar at the top of the screen.
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2. Tap More → Power Management → Reboot.

2.8.2 Hard shut down

If the Trex unit is unresponsive, do a hard shut down and then restart the Trex unit. Do not use this as your normal shut down method. Contact technical support if you need to repeatedly use the hard shut down.
Procedure
Press and hold the power button for 12 seconds. The Trex unit shuts down.

2.9 Home screen

The Home screen appears after you power on the Trex unit. The Home screen displays the installed applications and the status bar at the top of the screen. The Home screen may display one or more of the applications listed below.
Figure 2-14: Home screen
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Application Description
Field Communicator Connect to and configure HART or FOUNDATION fieldbus devices. The
Trex unit can also power one HART or FOUNDATION fieldbus device.
Fieldbus Diagnostics Measure the DC voltage, the noise, and the signal on a FOUNDATION
fieldbus segment. The Trex unit can also power one FOUNDATION fieldbus device.
Loop Diagnostics Measure loop current and voltage, control current, and power a HART
device when using a Trex unit with a Device Communicator Plus communication module.
Settings View and adjust settings for the Trex unit.
Trex Help View help topics that describe the hardware and applications on the
Trex unit.
ValveLink Mobile Run valve diagnostics for HART and FOUNDATION fieldbus Fisher
FIELDVUE digital valve controllers. You can not power a valve using ValveLink Mobile, but you can transfer the ValveLink Mobile diagnostic files to a PC using the Trex File Transfer Utility included with the Upgrade Studio install.
WirelessHART Provisioning
RadarMaster View enhanced dashboards for select Emerson level devices, and
AMS Inspection Rounds Increase productivity of visual inspections, and standardize and
Calculator Calculate on the fly with standard and enhanced operations in loop and
PDF viewer Download and display PDF files using File Transfer Utility.
Quickly provision connected WirelessHART devices to a Smart Wireless Gateway.
interact with echo curve displays.
synchronize data collection in the field.
unit conversion, and Ohm's law calculations.
Related information
Status bar

2.9.1 Return to the Home screen

If an application is open, you can return to the Home screen without exiting the application.
Procedure
1. Tap the status bar at the top of the screen.
2. Tap Home.

2.9.2 Status bar

The status bar lets you access settings and view information about the Trex unit. The status bar is displayed on the Home screen and in applications.
The status bar displays the following:
• Title of the screen (Home)
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• Time
• Paired icon
• USB icon
• Wireless icon
• Power module icon
• Pull-down tab
Figure 2-15: Status bar
Related information
Shortcut bar

2.9.3 Shortcut bar

The shortcut bar lets you access additional settings for the Trex unit and the Field Communicator application.
To view the shortcut bar, tap Settings on the Home screen or tap the status bar.
Figure 2-16: Shortcut bar
Option Description
Home
Apps
Brightness
Wi-Fi
Close the shortcut bar and return to the Home screen.
View the open applications or close an application.
Adjust the screen brightness.
Configure wireless settings.
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Option Description
More
Access additional menu options and settings, including power management, date and time, and touchscreen calibration. You can also modify settings for the Field Communicator application.

2.10 Settings

The Settings option lets you view information about the Trex unit hardware and modify settings for the Trex unit and applications. To view and modify settings, tap Settings on the Home screen or the status bar at the top of the screen to view the shortcuts menu. You can set the following:
• Screen brightness
• Wi-Fi connection
• A name for the Trex unit
• Date and time
• Screen calibration
• Language
• Power management options
• Security management options
• AMS Device Manager Sync
• Field Communicator application settings
• Platform Communications

2.10.1 View all open applications

You can have multiple applications open at one time. However, some applications may not be able to run simultaneously because they use the same Trex hardware. (An error message is displayed when this occurs.)
Procedure
1. Tap Settings or the status bar at the top of the screen.
2. Tap Apps. All open applications are displayed.

2.10.2 Close an application

You can close an application by tapping Exit in the application, or you can use the Settings to close it.
Procedure
1. Tap Settings or the status bar at the top of the screen.
2. Tap Apps.
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All open applications are displayed.
3. Select the X next to the application name.

2.10.3 Change the screen brightness

Procedure
1. Tap Settings or the status bar at the top of the screen.
2. Tap Brightness.
3. Use the slider to change the brightness.

2.10.4 Wireless communication

The Trex unit can connect to wireless networks to synchronize data on AMS Trex with AMS Device Manager. You can enable or disable wireless communication at any time.
When the wireless radio is turned on, the wireless icon displays in the status bar. The Wi-Fi option in Settings displays a list of wireless networks in range, as well as the ability to specify an IP address, if your network does not contain a DHCP server to automatically assign an IP address to the Trex unit. You can specify an IP address and a subnet mask, if required. Contact your network administrator for details.
Note
The Trex unit cannot connect to a wireless network that requires you to enter log in information on a website.
Icon Meaning
(status bar only) Wireless is turned on, but the Trex unit is not connected to a network.
Wireless is enabled and the Trex unit is connected to a network with a strong signal. The icon changes based on the signal strength.
Wireless network requires authentication to connect.
The currently connected network
Individual wireless networks in-range, or previously connected, will appear on the Wireless Networks screen. You can view the network SSID, security, profile (whether network configuration has been saved for future use), signal strength, and current connection status.
You can disconnect from a wireless network by sliding Wireless Networks to off, connecting to another network, or choosing Forget on a connected Wireless network.
Enable or disable wireless communication
Procedure
1. Tap Settings or the status bar at the top of the screen.
2. Tap Wi-Fi.
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3. Tap the Wireless Networks option to enable or disable wireless.
Connect the Trex unit to a broadcasting wireless network
Note
The Trex unit cannot connect to a wireless network that requires you to enter log in information on a website.
Procedure
1. Tap Settings or the status bar at the top of the screen.
2. Tap Wi-Fi.
3. Ensure the Wireless Networks option is set to ON. The wireless communication is enabled.
4. Tap the network you want to connect to. You can tap to the right or left of the network name.
5. Tap Connect, and enter credentials if prompted. Once connected, a checkmark is displayed next to the name of the network to show
it is connected to the network. The wireless icon in the status bar changes to
.
Connect the Trex unit to a non-broadcasting wireless network
You can connect to a wireless network that is non-broadcasting by manually entering required options when in range.
Procedure
1. Tap Settings or the status bar at the top of the screen.
2. Tap Wi-Fi.
3. Ensure the Wireless Networks option is set to ON. This enables the wireless radio in the Trex unit.
4. Tap Add Wi-Fi Network....
5. Edit the following options as needed. You may need assistance from your network administrator.
Option Description
Network SSID
Security
6. Tap Connect. Depending on the network security, you may need to enter credential information when the network is in range.
The name of the wireless network.
The type of security used for the wireless network.
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Enter a network address for an AMS Trex unit
You can specify how an AMS Trex unit connects to your network. Enter DHCP to allow a network address to be assigned, or Static to specify an IP address and/or Subnet Mask.
Note
Contact your network administrator before changing settings. Ensure the port you are sending to is configured to receive AMS Trex data.
Procedure
1. Tap Settings.
2. Tap Wi-Fi, and turn on Wireless Networks.
3. Tap IP Address, and tap the IP Address Assignment line to change from DHCP to Static.
4. Enter an IP Address, and/or Subnet Mask.
5. Tap OK.
Forget a wireless network
Forgetting a wireless network prevents the Trex unit from automatically reconnecting to it. You can forget a network to which you are currently connected, or one where you have entered credentials.
Procedure
1. Tap Settings or the status bar at the top of the screen.
2. Tap Wi-Fi, then tap the network.
3. Tap Forget. The network disconnects. If there is data that has not been synchronized with AMS Device Manager, you are prompted to confirm before disconnecting.
Change the default connection port
AMS Trex communicates with wireless networks at port 8009. If your network uses this port or restricts access to it, AMS Trex may not be able to communicate with the network. Contact your network administrator for details.
Procedure
1. Tap Settings → Platform Communications.
2. Tap to change the default, and enter a port number.
Postrequisites
If you change the default port for one AMS Trex unit, Emerson recommends setting all AMS Trex units to exchange data on that port. All AMS Device Manager stations that synchronize with AMS Trex units must also have the same port number. See AMS Device Manager Release Notes for details on changing port settings on the PC.
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2.10.5 View information about the Trex hardware and operating system

You can view the information about the Trex unit, including the name, serial number, support contract, operating system, open-source licenses, and the MAC address.
Procedure
1. Tap Settings or the status bar at the top of the screen.
2. Tap More → About.
3. Tap OK.

2.10.6 Enter a name for the Trex unit

You can enter a name to uniquely identify the Trex unit. This is helpful if you have multiple Trex units at your site. By default, the Trex unit is named "TrexXXXXXXXXXXXX" where the Xs are the serial number. This name is displayed in Upgrade Studio or AMS Device Manager.
Procedure
1. Tap Settings or the status bar at the top of the screen.
2. Tap More → About.
3. Tap Name.
4. Enter a new name up to 20 characters.
5. Tap OK.

2.10.7 View the application version number

You can view the version numbers for all the installed applications.
Procedure
1. Tap Settings or the status bar at the top of the screen.
2. Tap More → Installed Applications. The version numbers for all installed applications are displayed.
3. Tap OK to close the screen.

2.10.8 Set the time and date

Note
When you connect the Trex unit to a PC or a wireless network, the Trex unit updates to use the same time as the PC or wireless network.
Procedure
1. Tap Settings or the status bar at the top of the screen.
2. Tap More → Date & Time.
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3. Edit the following options as needed.
Option Description
Auto adjust daylight savings
Date
Date Format
Time
Time Format
Time Zone
Enable or disable the Trex unit from automatically adjusting the time for daylight saving time.
Enter the date.
Select the format for the date. You can select DD/MM/YYYY or YYYY/MM/DD.
Enter the time.
Select the 12 hour or 24 hour format.
Select the time zone.
4. Tap OK.

2.10.9 Calibrate the touchscreen

If the touchscreen seems inaccurate, you can recalibrate it.
Procedure
1. Note If your Trex unit is unresponsive to the touch screen, you can navigate to this menu with the arrow keys, then initiate the calibration.
Tap Settings or the status bar at the top of the screen.
2. Tap More → Display → Calibrate touch screen.
3. Tap the screen as indicated.
4. Tap OK.

2.10.10 Set the language on Trex

Changing the display language requires the AMS Trex unit to be rebooted. Make sure you have no outstanding changes before changing the display language.
Procedure
1. Tap the toolbar at the top of the screen.
2. Tap More → Language.
3. Select a language, and tap OK. The AMS Trex unit reboots and the new language is displayed. Not all applications support all available languages. The Trex unit does not support entering characters in non-Latin languages.
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2.10.11 View the amount of available memory

Procedure
1. Tap Settings or the status bar at the top of the screen.
2. Tap More → Memory Management.

2.10.12 Power management

You can configure options to conserve power usage.
Power management option Description
Dim Display (Backlight) timer Dim the backlight after a period of inactivity.
Suspend timer Turn off the backlight after a period of inactivity. Device
communication and power are not interrupted.
Note
If the Suspend timer is enabled, the Shut Down timer is ignored. Disable the suspend timer by setting the timer to Never to maximize the battery charge of your Trex unit.
Shut Down timer Shut down the Trex unit after a period of inactivity.
When the AC adapter is connected to the power module, all the timers are disabled. It is recommended to connect your Trex unit to the AC Adapter when not in use to ensure full charge of the power module and maximize the life of the battery.
Note
The timers are cumulative. For example, if you set the Dim Display (Backlight) timer to 5 minutes, the Suspend timer to Never, and the Shut Down timer to 10 minutes, the Trex unit shuts down after 15 minutes of inactivity.
Enter or exit suspend mode
Suspend mode is similar to standby mode on a phone. The screen is turned off, but all connectivity is maintained. If the Trex unit is powering a device before entering suspend, it continues to power and communicate with the device. If a Trex unit is connected to a network, it remains connected in suspend mode. You can put the Trex unit in suspend mode, or wait for the suspend timer to expire.
When in suspend mode, the Trex unit shuts down if there is no activity (key presses) after a specified amount of time. Use the Turn off after option on the Power Management screen to specify this time.
Procedure
1. To enter suspend, do one of the following:
• Quickly press the power button, and then tap Suspend.
• Tap Settings or the status bar at the top of the screen, and tap More → Power
Management → Suspend.
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• Wait until the suspend timer expires.
2. To leave suspend, quickly press the power button or tap the touchscreen.
Related information
Set the suspend timer
Set the backlight timer
To conserve power, set the backlight timer to automatically dim the backlight after a specified period of inactivity.
The timer is enabled only when the AC adapter is not connected to the Trex unit.
Procedure
1. Tap Settings or the status bar at the top of the screen.
2. Tap More → Power Management → Dim display after.
3. Select the number of minutes. The default is 5 minutes.
4. Tap OK.
Set the suspend timer
To conserve power, set the suspend timer to automatically enter suspend mode after a period of inactivity, such as no key presses. Suspend is similar to the standby mode on a phone. The Trex unit shuts down if there is no activity (key presses) after a specified amount of time. Use the shut down timer to specify this time.
The timer is enabled only when the AC adapter is not connected to the Trex unit.
Procedure
1. Tap Settings or the status bar at the top of the screen.
2. Tap More → Power Management → Suspend after.
3. Select the number of minutes. The default is set to Never.
4. Tap OK.
Set the shut down timer
To conserve power, set the shut down timer to automatically shut down the Trex unit after a period of inactivity, such as no key presses or taps on the screen.
The timer is enabled only when the AC adapter is not connected to the Trex unit.
Procedure
1. Tap Settings or the status bar at the top of the screen.
2. Tap More → Power Management → Turn off after.
3. Select the number of minutes. The default value is set to 30 minutes.
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4. Tap OK.

2.10.13 Enable or disable automatically connecting to HART devices

If this option is enabled, the Field Communicator application searches for and automatically connects to an externally-powered HART device at address zero and displays its device menu. This makes the connection process faster. If this option is disabled, the Field Communicator application polls addresses zero and 63 and displays the Device List, so you can select a device from the list or change polling options from the My Device Not Found button.
You may want to disable this option in the following situations:
• The Trex unit is connected to a multi-drop HART loop, and you want to configure a
device at another address.
• The Trex unit is connected to a transmitter at address zero with a THUM adapter.
Otherwise, the Trex unit may automatically connect to the transmitter at address zero, and would not allow you to connect to the THUM adapter.
• You want to configure multiple THUM adapters and do not want to adjust the polling
option.
Procedure
1. Tap Settings or the status bar at the top of the screen.
2. Tap More → Field Communicator App Settings.
3. Tap Auto-Connect to enable or disable the option.
4. Tap OK.

2.10.14 Enable Diagnostic Logging

Procedure
Note
You should only enable Diagnostic Logging when directed by Emerson service personnel.
From Settings → Field Communicator App Settings tap Diagnostic Logging to ON.

2.11 Applications on the Trex unit

The Home screen displays all the applications installed on the Trex unit. Open applications by tapping the icon on the Home screen.
Field Communicator, Settings, and Trex Help applications do not require activation to work. Other applications on the Trex unit may be disabled until you activate the Trex unit. You can use Upgrade Studio to activate the Trex unit. Other applications may be disabled because you did not purchase a license for the functionality, or the Trex unit does not have the required communication module.
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You can run some applications simultaneously on the Trex unit, while other applications may require the same hardware and cannot run at the same time. An error message is displayed on the screen when that occurs. Applications, such as the Field Communicator application and Settings, can run simultaneously. To switch between applications that can run simultaneously, tap the status bar at the top of the screen and tap Apps. You can then select the open application you want to view and use.
You can purchase new applications or get updates to applications from Upgrade Studio. See the Upgrade Studio Help for more information.
Related information
Home screen View the application version number

2.11.1 Activation

After you receive the Trex unit, it is recommended that you activate it using Upgrade Studio. Activation allows you to receive and install updated content on the Trex unit, as well as give you access to additional applications. Some applications may require you to purchase a license.
A reminder message is displayed each time you power on the Trex unit until activation is completed.

2.11.2 Close an application

You can close an application by tapping Exit in the application, or you can use the Settings to close it.
Procedure
1. Tap Settings or the status bar at the top of the screen.
2. Tap Apps. All open applications are displayed.
3. Select the X next to the application name.

2.12 USB communication

The Trex unit supports USB communication with PCs. The Trex unit has a micro USB port on the top left corner of the unit. The required USB driver is automatically installed with Upgrade Studio and AMS Device Manager. You can:
• transfer files to the Trex unit, using Upgrade Studio
• pair the Trex unit with an AMS Device Manager system to synchronize data
To help ensure proper communication between the Trex unit and the PC, do not use a USB
2.0 cable that is longer than 2 meters. Do not connect more than one Trex unit to an AMS Device Manager station at one time.
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CAUTION
• Remove the USB cable from the Trex unit before connecting to a device.
• Do not use USB communication in a hazardous area.

2.13 Synchronizing AMS Trex data with AMS Device Manager

AMS Trex provides the ability to connect to AMS Device Manager and update the AMS Device Manager database with device data. The initial operation that enables this is a pairing of an AMS Trex unit with a single AMS Device Manager station.
By default, synchronization happens automatically when AMS Trex is connected to a paired AMS Device Manager station using USB, or when it is connected to a Wi-Fi network that can communicate with an AMS Device Manager Server Plus. Synchronization occurs when the devices match in both systems (by manufacturer, device type, device revision, and protocol version).
Note
AMS Trex cannot communicate wirelessly with an AMS Device Manager system whose ServerPlus name is not a valid hostname (for example, named with an IP address).
In the AMS Device Manager Sync screen in Settings, AMS Trex shows:
• The name of the AMS Device Manager station to which the unit is paired, along with an
option to unpair. A Trex unit can only be paired with one AMS Device Manager system at a time.
• An indication of whether data is pending to be synchronized to AMS Device Manager
• The time of the last synchronization
After a Trex unit has been paired to an AMS Device Manager system, synchronization happens automatically when:
• A Trex unit is connected to the AMS Device Manager station by USB OR
• A Trex unit wireless radio is on, and is connected to a wireless access point
Note
AMS Device Manager will synchronize with as many paired AMS Trex units as are connected to wireless, and in-range. An Audit Trail entry indicates each pairing, unpairing, and synchronization with a specific Trex unit.
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2.13.1 Synchronize AMS Trex data to AMS Device Manager using USB

Prerequisites
CAUTION
Remove the USB cable from the Trex unit before connecting to a device.Do not use USB communication in a hazardous area.
AMS Device Manager is licensed to communicate with AMS Trex. AMS Device Manager is paired with the AMS Trex Device Communicator being
synchronized.
Procedure
1. Connect the micro-USB end of the cable to the AMS Trex unit.
2. Connect the USB to the AMS Device Manager station. AMS Trex begins downloading Audit Trail events to the AMS Device Manager Audit Trail.
Note
If the AMS Trex unit Wireless is turned on and connected to a network containing the paired AMS Device Manager station, you do not need to sync using USB. Any data that is new since the last synchronization will automatically connect and download to the AMS Device Manager database.

2.13.2 Pair an AMS Trex unit with an AMS Device Manager station

CAUTION
Remove the USB cable from the Trex unit before connecting to a device.
CAUTION
Do not use USB communication in a hazardous area.
Prerequisites
The user pairing the AMS Trex unit to AMS Device Manager must have the Manage Connections permission in User Manager.
AMS Device Manager is running, and the Device Explorer or Device Connection View is displayed. Pairing can only be done from the AMS Device Manager station, not from the Trex unit. Only one concurrent USB Trex connection to an AMS Device Manager station is supported.
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Procedure
1. Connect the microUSB cable to the AMS Trex unit, and then connect the USB to an AMS Device Manager station.
2. In AMS Device Manager, expand the AMS Trex Units node to display a list of AMS Trex units.
3. Right-click the unpaired icon, and select Pair Trex Unit. The icon changes to indicate the unit is paired, and an Audit Trail event is created to indicate the pairing.
Related information
Unpair an AMS Trex unit

2.13.3 Unpair an AMS Trex unit

You can unpair a Trex unit from the AMS Device Manager software or from the Trex unit. To assure device data is not lost, you should unpair from the AMS Device Manager UI.
Unpair from an AMS Device Manager station
From AMS Device Manager, connect the microUSB to the Trex unit, and then connect the USB to an AMS Device Manager system where it is currently paired. Right-click the unit and choose Unpair Trex Unit.
Pairing an AMS Trex unit to another AMS Device Manager station will also unpair it from the current station.
Unpair from an AMS Trex unit
If you are unable to unpair from the AMS Device Manager station, you can also unpair from the Trex unit itself:
Procedure
1. Connect the microUSB to the Trex unit, and then connect the USB to an AMS Device Manager system where it is currently paired.
2. On the AMS Trex unit, tap Settings or the status bar at the top of the screen.
3. Tap More → AMS Device Manager Sync.
4. Tap X. You will be prompted to confirm unpairing. If any data is in the process of synchronizing, it will be lost. If the AMS Trex unit is not connected to AMS Device Manager when unpairing, any data on the unit will be lost when re-connected.
Note
Pairing a Trex unit is only done from an AMS Device Manager station.
Related information
Pair an AMS Trex unit with an AMS Device Manager station
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2.14 Upgrade Studio

Upgrade Studio is a PC application that lets you update the Trex units at your site with new/updated device descriptions, applications, firmware, and operating systems. You can download the updates to Upgrade Studio, or you can import the updates into Upgrade Studio from a DVD or other physical media, network, or local drive. (You can use Upgrade Studio with or without an internet connection.)
After the updates are downloaded or imported into Upgrade Studio, you can transfer and install the updates onto the connected Trex unit.
Upgrade Studio also provides a link to a website where you can purchase new applications, accessories, or Trex units or identify the sales channel for your area.
Upgrade Studio lets you:
• Create and use your Trex online user account to activate the Trex unit, download
updates, view support contract information, or access the online store, if it is available in your area.
• Activate the Trex unit. (Activation is required to install updates and access additional
features.)
• Download new or updated device descriptions, applications, firmware, and operating
systems for the Trex unit.
• Import new or updated device descriptions, applications, PDF files, firmware, and
operating systems for the Trex unit into Upgrade Studio. Use the Import option if the PC does not have an internet connection and cannot download updates. (You can also import Trex synchronization files or updates to Upgrade Studio.)
• Transfer and install the updates onto the Trex unit.
• Download and install a newer version of Upgrade Studio.
• View the files that are installed on the Trex unit and additional information about the
Trex unit.
• Enable security on your Trex unit.
If you do not have access to a DVD drive to install Upgrade Studio, visit the support page to download the software.
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2.14.1 Connect the Trex unit to Upgrade Studio using USB

Prerequisites
CAUTION
• Remove the USB cable from the Trex unit before connecting to a device.
• Do not use USB communication in a hazardous area.
• Upgrade Studio cannot connect to multiple Trex units at one time. Only one
connection via USB is supported.
• To help ensure proper communication between the Trex unit and the PC, do not use a
USB 2.0 cable that is longer than 2 meters.
Procedure
1. Ensure the Trex unit is powered on.
2. Connect the microUSB cable to the top of the Trex unit, and then to the PC where
Upgrade Studio is installed.
Note
The USB driver is installed when you install Upgrade Studio.
3. In Upgrade Studio, click Activate Units or Install Updates.
4. If you do not see the Trex unit, select Show All Trex units from the drop-down bar.
Upgrade Studio connects to the Trex unit and the icon appears on the screen.

2.14.2 Create a Trex online user account

Upgrade Studio provides a link to a website to create a user account. You need a user account to:
• Activate the Trex unit. (A user account is needed for activation when Upgrade Studio
has an internet connection.)
• Download updates for the Trex unit or Upgrade Studio.
• View the support contract information for the Trex unit.
• Access the Trex online store, if it is available in your area.
Procedure
1. In Upgrade Studio, click Login → Create an Account.
A web browser opens.
2. Enter your information.
3. Click Submit.
4. Wait for notification via email that the user account is available.
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5. Follow any additional steps described in the notification email.

2.14.3 Activate the Trex unit

Prerequisites
Create a user account in Upgrade Studio. The Trex unit displays an activation reminder message each time you power on the Trex
unit until it is activated. Activation enables the full functionality on the Trex unit and associates the Trex unit with your user account/company.
Upgrade Studio can activate the Trex unit with or without an internet connection. The procedure below is for PCs with an internet connection.
Procedure
1.
Connect the Trex unit to the PC where Upgrade Studio is installed.
2. In Upgrade Studio, click Activate Units.
3. Click Login.
4. Enter your username and password, if prompted, and click Login.
Logging in enables Upgrade Studio to retrieve the correct activation code for the Trex unit. If you do not log in, you need to click the "Don't have an activation code?" link to request an activation code. When you receive the activation code, enter or copy/paste the code onto the Activate Units screen.
5. Click the Trex unit displayed on the left side of the screen.
6. Click Activate.
A message confirming the activation was successful is displayed.

2.14.4 Activate the Trex unit without using an internet connection

Prerequisites
To activate the Trex unit without using an internet connection, request an activation code by emailing Emerson at option 2 (U.S. and Canada) or +63.2.702.1111 (worldwide) and providing the serial number. The serial number is located on the bottom of the Trex unit, but you can also access the serial number by connecting the Trex unit to Upgrade Studio and then hovering the cursor over the Trex unit icon.
Procedure
Connect the Trex unit to the PC where Upgrade Studio is installed.
1.
2. In Upgrade Studio, click Activate Units.
3. Click the connected Trex unit that is displayed on the left side of the screen.
4. Enter or copy/paste the activation code you received.
5. Click Activate. A message confirms the activation was successful.
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6. Click More → Export.
7.
Under Trex Synchronization Files, click Show Details.
8. Select one or more Trex synchronization files to export.
9. Click Export.
10. Select a location to save the Trex synchronization file, and click OK.
11. If you are not using the air-gap deployment, email the exported Trex synchronization file to
12. If you are using the air-gap deployment, do the following:
a) Open Upgrade Studio on the PC that has an internet connection.
b) Transfer the Trex synchronization file to that PC.
c) Click More → Import Package.
d) Browse to the location that has the Trex synchronization file, and click OK.
e) Click Import.
f) Click OK.
g) Log in with your username and password. Upgrade Studio uploads the Trex
synchronization file.

2.15 AMS Trex Security

Upgrade Studio lets you manage secure access to Trex units. You can configure a Trex unit to have Local, Enterprise, or no security scheme.
Initial setup
An Upgrade Studio user can initially set the security of a Trex unit to either Local or Enterprise security. Subsequently, only this user can change the security scheme of the Trex unit. Other users may change the security scheme once the first user changes the security to None.
Local security
Local security only allows user accounts created on the Trex unit to access it. When local security is selected, an Administrator user must be created on the Trex unit.
This Administrator user can create or delete other users on the Trex unit. The Administrator user is only deleted when the security of the Trex unit is set to None using Upgrade Studio.
Enterprise security
Enterprise security requires Windows Active Domain credentials to access a Trex unit. When enterprise security is selected, a Windows domain name, wireless network service
set identifier (SSID), username, and password is required the first time the Trex unit is used. A wireless network with WPA2-Enterprise security is required.
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Near-field communication (NFC) card access
You can use an NFC card, a technology used in badge entry systems or payment cards, to control access to a Trex unit using the Security Management settings. You must first enable a security scheme on the Trex unit before pairing it with an NFC card. Pairing the Trex unit with an NFC card requires you to enter a PIN. Only one NFC card and PIN assignment is supported for a Trex unit user.
The Trex unit supports NXP NTAG21x series NFC cards. The NTAG21x series are 2nd generation NFC chips by NXP. The NTAG21x series NFC cards have a unique 7-byte UID (Serial Number) that Trex units use when pairing a card to a user.
Note
The Trex unit does NOT have security enabled out of the box.

2.15.1 Enable local security for a Trex unit

Procedure
1. Connect the Trex unit to the PC where Upgrade Studio is installed.
2. In Upgrade Studio, select More → AMS Trex Security.
3. Click the Trex unit that is displayed on the left side of the screen.
4. Select Local.
5. Click Change Security Type.
6. Click Yes. The Trex unit will restart.
7. Click OK.
8. On the Trex unit, create a local administrator by entering a user name and password and confirming the password.
9. Tap OK.
Note
The local administrator can add or delete other users on the Trex unit.

2.15.2 Enable enterprise security for a Trex unit

Procedure
1. Connect the Trex unit to the PC where Upgrade Studio is installed.
2. In Upgrade Studio, select More → AMS Trex Security.
3. Click the Trex unit that is displayed on the left side of the screen.
4. Select Enterprise.
5. Click Change Security Type.
6. Click Yes. The Trex unit will restart.
7. Click OK.
8. On the Trex unit, enter the following information:
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• Domain - the Windows domain.
• Network SSID - the wireless network SSID. The wireless network must have
WPA2-Enterprise security enabled.
• User name - the domain user name.
• Password - the password for the domain user name.
9. Tap OK.

2.15.3 Disable security for a Trex unit

Note
Only the Windows user who enabled security using Upgrade Studio can disable security.
Procedure
1. Connect the Trex unit to the PC where Upgrade Studio is installed.
2. In Upgrade Studio, select More → AMS Trex Security.
3. Click the Trex unit that is displayed on the left side of the screen.
4. Select None.
5. Click Change Security Type.
6. Click Yes. The Trex unit will restart.
7. Click OK.
Note
The Trex unit deletes all user information and NFC card assignments.

2.15.4 Create a local user account

Prerequisites
Local security must be enabled on the Trex unit.
Procedure
1. Log in to the Trex unit using the local administrator account.
2. Tap Settings.
3. Tap Security Management.
4. Tap Add user.
5. Enter a user name and tap OK.
Notes
• The new user can only log in after the Trex unit is restarted.
• The new user will be prompted to enter a password during login.
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Related information
Enable local security for a Trex unit

2.15.5 Delete a local user

Procedure
1. Log in to the Trex unit using the local administrator account.
2. Tap Settings.
3. Tap Security Management.
4. Tap Remove user.
5. Select a user.
6. Tap Yes.

2.15.6 Reset the password of a local user

Procedure
1. Log in to the Trex unit using the local administrator account.
2. Tap Settings.
3. Tap Security Management.
4. Tap Reset Password.
5. Select a user.
6. Tap Yes.
Note
The user will be prompted to enter a new password on the next login.

2.15.7 Pair an NFC card to a user

Prerequisites
Local or enterprise security must be enabled on the Trex unit.
Procedure
1. Log in to the Trex unit.
2. Tap Settings.
3. Tap Security Management.
4. Tap Pair NFC card.
5. Tap the NFC card on the navigation buttons of the Trex unit to scan it.
6. Enter a 4-digit PIN code.
7. Tap OK.
Related information
Enable local security for a Trex unit
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Enable enterprise security for a Trex unit

2.15.8 Remove a paired NFC card

Procedure
1. Log in to the Trex unit.
2. Tap Settings.
3. Tap Security Management.
4. Tap Remove NFC pairing.
5. Tap Yes.

2.16 Transferring files to a PC

When you install Upgrade Studio, the Trex File Transfer Utility is also installed. This application lets you transfer logging or other files to a PC. Use the USB cable to connect the Trex unit to the PC where the application is installed. See the Help included with Upgrade Studio for more information.

2.17 Maintenance and repair

Any maintenance, repair, or replacement of components not listed below must be performed by specially trained personnel at an authorized service center. You can perform common maintenance procedures listed below:
• Clean the exterior. Use only a dry, lint-free towel or dampen the towel with an alcohol
or mild soap and water solution.
• Clean the touchscreen.
• Install, remove, or charge the power module.
• Remove and replace the stand.
• Ensure that all exterior screws are sufficiently tightened.
• Ensure the communication terminal recess is free of dirt and debris.
• Install and remove the communication module.

2.17.1 Replace the stand

Procedure
1. Place the Trex unit face down on a level, secure surface.
2. Lift up the stand.
3. Use a Torx® screwdriver to loosen and remove the two screws under the stand.
4. Remove the stand.
5. Place the new stand on the Trex unit.
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6. Insert and tighten the two screws. Do not over tighten the screws. Use 0.5Nm
maximum torque load.

2.17.2 Calibration

Calibration is not supported on the AMS Trex Device Communicator. Voltage, current, signal, and noise measurements made by the Trex unit are intended for troubleshooting purposes. NIST standards are not applicable to the AMS Trex Device Communicator.
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3 Field Communicator application

The Field Communicator application lets you configure HART and FOUNDATION fieldbus devices. (The fieldbus functionality requires a license.) You can do the following:
• Power and connect to a HART transmitter, if the Trex unit has the Device
Communicator Plus communication module. The Trex unit has an internal resistor, so you do not need to add a loop resistor.
• Power and connect to a HART positioner, if the Trex unit has the Device Communicator
Plus communication module.
• Power and connect to the Smart Wireless THUM™ Adapter, if the Trex unit has the
Device Communicator Plus communication module.
• Power and connect to a FOUNDATION fieldbus device, if the Trex unit has the Device
Communicator Plus communication module. The Trex unit provides power, power conditioning, and two terminators.
• Connect to an externally-powered HART or FOUNDATION fieldbus device.
• Use the internal resistors in the Trex unit when connecting to an externally-powered
HART transmitter. The internal resistors in the Trex unit temporarily convert an externally-powered 4-20 mA current loop into a HART loop.
• Save menu items from HART devices to a list of favorites for quick access.
• Simulate a HART or FOUNDATION fieldbus device.
Note
The Field Communicator application can be used with the Device Communicator communication module or Device Communicator Plus communication module. However, the Trex unit cannot power a HART or FOUNDATION fieldbus device with the Device Communicator communication module.

3.1 Open or close the Field Communicator application

Procedure
1. To open the application, tap the Field Communicator icon on the Trex Home screen. The Auto-Detect screen is displayed while the Field Communicator application tries to detect a connected device. If you tap Cancel on the Auto-Detect screen, the Field Communicator application stops checking for devices and displays the Connect - Select screen.
2. To close the application, tap Exit if the Connect - Select screen is displayed. Otherwise, tap Back until that screen is displayed.
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3.2 Device interoperability

The Trex unit communicates with many HART and FOUNDATION fieldbus devices independent of device manufacturer by using Electronic Device Description Language (EDDL) technology.
Basic testing is performed on all device descriptions. New device descriptions are available from the Upgrade Studio application or the resource DVD.

3.3 Forward Compatibility rules for saving and sending configurations to AMS Trex

Note
Do not edit configurations on the AMS Trex unit while connected to Configuration Management.
You can edit offline configurations on the Trex unit according to forward compatibility rules:
• To edit a configuration with Trex, you must have the proper device description installed
on Trex. The installed device description must match the device type and device revision of the configuration. If the configuration does not exactly match the device description on the Trex unit, you cannot save the configuration.
• To send a configuration to a device, you must have the proper device description
installed on Trex. The installed device description must be for the same device type, and equal to or greater than the device rev of the configuration.
• You cannot save or send configurations when using the generic device description.

3.4 Automatically detect a device

The Field Communicator application can automatically detect a device, without requiring any input from you. When you open the Field Communicator application or when the Connect - Select screen is displayed, the Trex unit checks for the most common connection scenarios and, if possible, detects the connected device and displays the Device List. You can then select a device and display its device menu. The auto-detect feature lets you skip the device connection wizard in the Field Communicator application, which allows for faster connections to devices.
The Field Communicator application can automatically detect:
• A HART device that is on an externally-powered compliant HART loop, and the device is
communicating at address zero.
• A 4-wire HART device that is communicating at address zero. (This may require a
resistor across the HART terminals. Check the device documentation for the proper connection.)
• A WirelessHART device that is powered by its battery, and the device is communicating
at address zero.
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• A powered FOUNDATION fieldbus segment that is actively communicating. The
fieldbus segment must have a host system or a FOUNDATION fieldbus device that is the Link Active Scheduler (LAS).
While the Trex unit is connecting to the device, the Auto-Detect screen is displayed to show the status. If you tap Cancel, the Connect - Select screen is displayed and the Trex unit stops the connection process.
Note
For HART devices, the Field Communicator application can automatically detect and connect to the device if the Auto-Connect option in the Trex Settings is enabled. If this option is enabled, the device menu is displayed rather than the Device List.

3.4.1 Automatically connect to a HART device

The Field Communicator application can automatically detect and connect to a HART device, without requiring any input from you. When you open the Field Communicator application or when the Connect - Select screen is displayed, the Trex unit checks for the most common connection scenarios and, if possible, connects to the device and displays the device menu.
To use the auto-connect feature, ensure the Auto-Connect option is enabled (Settings → Field Communicator App Settings → Auto-Connect), and the Trex unit is connected to one of the following:
• A HART device that is on an externally-powered compliant HART loop, and the device is
communicating at address zero.
• A 4-wire HART device that is communicating at address zero. (This may require a
resistor across the HART terminals. Check the device documentation for the proper connection.)
• A WirelessHART device that is powered by its battery, and the device is communicating
at address zero.
If the Trex unit cannot automatically connect to the device, tap HART on the Connect - Select screen and follow the prompts from the device connection wizard to connect to the device.
Note
You can disable the Field Communicator application from automatically connecting to a device at address zero. If you disable this option, the Trex unit still detects the device at address zero, but you need to select the device on the Device List to connect and view the device screens. You may also want to disable this option if the Trex unit is connected to a transmitter at address zero with a THUM adapter.

3.5 Connect - Select screen

If the Trex unit cannot automatically detect or connect to the device when you open the Field Communicator application, the Connect - Select screen is displayed. The Connect - Select screen is the home screen for the Field Communicator application.
You can do the following on the Connect - Select screen:
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• Connect the lead set to the Trex unit and to the device to try to automatically detect/
connect to the device. If the device meets the criteria for automatically connecting, the Trex unit tries to connect to the device.
• Tap HART or Fieldbus to start the device connection wizard and connect to the device.
• Tap HART Offline or Fieldbus Offline to simulate a device.
Figure 3-1: Connect - Select screen
Note
To switch between HART communication and FOUNDATION fieldbus communication, you must exit and restart the Field Communicator application. After the HART or Fieldbus Device Lists are displayed, the HART or Fieldbus buttons disappear until you restart the application.
Option Description
Power Status
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Option Description
Communication Status
HART
HART Offline
Fieldbus
Fieldbus Offline
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.)
To return to the Connect - Select screen from a device screen, press Menu → Disconnect.
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.
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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.
Problems the device connection wizard can detect
The device connection wizard can also identify common wiring problems, including if the wrong terminals on the Trex unit are used or if a lead set is not connected to the device or the Trex unit. If a problem is detected, a message describes the problem or a graphic shows the correct wiring.
The Trex unit continuously monitors the voltage and current at the terminals where the lead set is connected. the Field Communicator application displays a message if an error is detected, including if the lead set is removed from the device or Trex unit. For example, if you try to enable the Trex unit to power a device that already has power, the Field Communicator application displays a message that voltage was detected and the Trex power supply is turned off to protect the device and Trex unit.
In some cases, you may be able to override the warning from the device connection wizard. For example, some devices may hold voltage for several minutes after being disconnected from the power supply. If you enable the Trex unit to power a device that is still holding a low voltage (less than 8 volts), a message is displayed that the Field Communicator application detects low voltage and asks if the Trex unit is connected to a digital control system's control loop. You can override this warning and apply power if you are sure the device is not connected to an external power supply.
If the device connection wizard detects a problem, you can fix the issue while the connection wizard is displayed. The change is updated in the Power Status and Communication Status sections.

3.7 Status when detecting a device

When the Trex unit tries to detect and connect to a device, the Power Status option and the Communication Status option on the Connect - Select screen show one of the following status messages.
Power Status Message Description
Voltage Detected on HART Typical status for connecting across HART device's
communication terminals when the device is on an externally­powered loop. The detected voltage is greater than or equal to 8 volts.
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Power Status Message Description
Voltage Detected on HART+ pwr
Low Voltage Detected on HART Typical status for connecting:
Low Voltage Detected on HART + pwr
The detected voltage is greater than or equal to 8 volts.
• To a 4-wire HART device
• To a WirelessHART device
• Across a resistor
• Across HART control system modules
The detected voltage is between 0.5 and 8 volts.
Note
You may see this status when the AC adapter is attached to the Trex unit. If low voltage is detected, disconnect the AC adapter.
Note
This message can also appear if the Trex unit connects to a device that was recently powered. Some devices may hold voltage for several minutes after being disconnected from its power supply. The Trex unit provides a warning message that it detects voltage.
If you try to power a device when this occurs, the Trex unit asks if you want to ignore the voltage warning and proceed with sourcing power. If you select Yes, the Trex unit powers the device.
The detected voltage is between 0.5 and 8 volts.
No Voltage Detected Typical status for connecting:
• An unpowered device.
• To some types of 4-wire HART devices.
• To some types of WirelessHART devices.
This status is also displayed when the lead set is not connected to a device, or when the Trex unit is connecting to a device.
Voltage Detected on FF Typical status for connecting to an externally-powered fieldbus
segment. The detected voltage is greater than or equal to 8 volts.
Low Voltage Detected on FF The measured voltage is less than 8 volts.
Voltage Provided from FF pwr The typical status when the Trex unit is powering the
FOUNDATION fieldbus device. The detected voltage is greater than or equal to 8 volts.
Voltage Provided from HART+ pwr
The typical status when the Trex unit is powering the HART device. The detected voltage is greater than or equal to 8 volts.
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Power Status Message Description
Voltage on Multiple The Trex unit has detected voltage on more than one terminal.
This may be due to the following:
• The AC adapter is attached to the Trex unit and is charging
the power module. Disconnect the AC adapter from the Trex unit.
• Noise is detected on the network.
• Two lead sets are connected to two different fieldbus
segments or loops. This is not recommended.
Communication Status Description
No Communication The Trex unit has not detected any HART or fieldbus
communication.
Fieldbus Detected The Trex unit has detected FOUNDATION fieldbus
communication.
HART Detected Typical status when the Trex unit detects:
• A HART device in burst mode.
• Active HART communication from the digital control system.
• A response to a polling message sent to the device.
This status may be sporadic and may alternate between HART Detected and No Communication.
If unexpected communications are detected, remove the AC adapter to isolate the Trex unit from noise.

3.8 Online menu or Device Dashboard

Depending on the device description (DD) for a device, the first online screen is an Online menu or a device dashboard menu. All devices show a Menu tab at the bottom of the screen.
Online menu
An Online menu may display the following options, depending on the device type:
• Device setup
• Primary variable (PV)
• Analog output (AO)
• PV lower range value (LRV)
• PV upper range value (URV)
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Figure 3-2: Online menu example
Dashboard menu
A device dashboard menu displays the same parameters as the Online menu, but they are organized by tab, including:
• Overview - View a graphical representation of the process variable. Tap the More
arrow on the bottom right side of the screen to access additional menu items. Depending on the device description, the images under "Device" and "Communications" may be selectable links.
• Service Tools - View and modify options for alerts, variables, and maintenance. For
FOUNDATION fieldbus devices, the Service Tools option lets you edit the device tag and address, and set the IO block schedule and the link master device. You can also access the blocks directly from the Block List option on the Service Tools screen.
• Configure - Configure the device parameters.
The options below vary based on the device description for the device.
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Figure 3-3: Dashboard menu example

3.8.1 Device screen layout

In the Field Communicator application, the device screens have four main parts:
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Figure 3-4: Sections of a device screen
A. Status bar
B. Application title bar C. Device menu D. Application bar
Status bar
Lets you access the settings for the Trex unit and switch to other applications.
Application title bar
Displays the type of device the Trex unit is connected to, the device tag (short tag or long tag), and the menu title (Online). If you tap the application title bar, a menu is displayed. Depending on the type of device, the menu lets you view the HART short/long tag or more information about the device description, including the manufacturer, device type, device revision, and device description revision. A Back or Exit button is also displayed.
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Device menu
The menu options for a specific device type and revision. The options displayed will vary based on the device description. You can press and hold a menu item to display an additional menu that lets you view Help or add the item to the list of favorites (HART only).
Application bar
Displays the main groups of options for a device. Most devices have an Online option. Devices that display a device dashboard display Overview, Configure, and Service Tools.

3.8.2 Application bar

The application bar lists the main options for the connected device. Depending on the device description, you may see a different application bar than the one described below. See the device documentation for more detailed descriptions of these options.
Figure 3-5: Example of an application bar at the bottom of the screen
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Option Description
Menu
Online
Overview
Service Tools
Configure
View the list of favorites for HART devices, simulate a device, or connect/disconnect a device.
View the process variable and configure device parameters.
(Device dashboard screen only) View a graphical representation of the process variable. The More option lets you access the device parameters.
View and modify options for alerts, variables, and maintenance. For FOUNDATION fieldbus devices, commonly used parameters are also accessible, including the device tag, device address, IO block schedule, link master configuration, and device information.
(Device dashboard screen only) Configure the device parameters.

3.8.3 Menu screen

The Menu screen lets you connect/disconnect a device, edit and save a configuration, send a configuration (only for a connected device), set a favorite, or simulate a device.
To access the Menu screen without connecting to a device, tap HART Offline or Fieldbus Offline on the Connect - Select screen. The Menu screen is also displayed when the Trex unit is connected to a HART or FOUNDATION fieldbus device. Both the Online screen and the device dashboard screen display the Menu screen.
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Figure 3-6: Menu screen for a connected HART device
Option Description
Connect or Disconnect Tap Connect to return to the Connect - Select screen and connect to
a device. Tap Disconnect to stop communicating with a device. The Trex unit also stops powering the device when you tap Disconnect.
Favorites
Simulate
Save Config
Send Config
Offline Config
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Save frequently used menu items to a list for quick access. The Favorites option is available for only HART devices.
Simulate a connection to a live HART or FOUNDATION fieldbus device, depending on if you selected HART Offline or Fieldbus Offline. This option is displayed only if a device is not connected to the Trex unit.
Save a configuration for this device to the AMS Trex unit.
Send a configuration to a connected HART device. This option is displayed only if a device is connected to the Trex unit.
Create or edit a configuration on the AMS Trex unit.
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You can also connect a device, simulate a device, or edit a configuration from the Menu screen.
Figure 3-7: Menu screen for no connected HART device

3.9 Icons on the device menus

When the Trex unit is connected to a device, the device menus may have one or more icons.
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Figure 3-8: Device menu with icons
Icon Description
The option is a parameter you can edit, such as the device tag.
The option is a device method, such as a loop test.
The option has a submenu with additional options.
The option is a graph or chart. Charts display a graphic view of variables as they occur over time.
The option is a gauge chart. A gauge chart formats device data into a view similar to an analog car speedometer and plots device data varying with time.
The option is a grid.
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Icon Description
The option is an image.
No icon The option is a process variable. The process variable value may or may not be
displayed, depending on the device description for the device.

3.10 Connections to HART devices

The Trex unit can communicate with a device from the control room, on the bench, or any wiring termination point in the loop. Review the HART wiring diagrams to ensure the Trex unit is correctly connected to the device.
Note
The Trex unit acts as a secondary HART master on a HART loop.
Related information
Internal resistors

3.10.1 HART communication terminals

The Trex unit has communication terminals that enable it to communicate with a HART device. Insert the lead set into the red and black terminals and connect to a HART device.
Note
The lead set must be used to communicate with a wired or wireless device.
Figure 3-9: HART communication terminals on the Device Communicator communication module
A. Communicate with an externally-powered HART device
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Figure 3-10: HART communication terminals on the Device Communicator Plus communication module
A. Power and communicate with a HART device.
B. Communicate with an externally-powered HART device.
Related information
Wiring diagrams for HART devices and the Field Communicator application Power and connect to a HART device

3.10.2 Wiring diagrams for HART devices and the Field Communicator application

The Trex unit can communicate with a device from the control room, on the bench, or any wiring termination point in the loop. Connect the lead set to the Trex unit and to the communication terminals on the device or across the resistor.
Below each diagram, a table lists the expected prompts from the device connection wizard and the answers to complete the connection. The prompts appear only if the Field Communicator application could not automatically detect or connect to the device.
Note
The Trex unit acts as a secondary HART master on a HART loop.
CAUTION
Remove the USB cable from the Trex unit before connecting to a device.
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Figure 3-11: Power and connect to a 2-wire HART transmitter
Note
When the Trex unit powers the HART transmitter, an external resistor is not needed. The Trex unit uses an internal resistor that is automatically used when you enable the Trex unit to power the transmitter.
Note
Do not insert a resistor in parallel with either the HART+pwr or HART terminals on the Trex unit, or in parallel with the device's communication terminals. This may prevent communications.
Device connection wizard prompts Answer
Do you intend to provide power from the Trex unit?
Are you providing power to a transmitter or positioner?
Change Polling Option? Tap Yes if the device is not at address
Yes
Transmitter
zero.
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Figure 3-12: Connect to a powered
Wireless
HART device (with its battery attached)
CAUTION
Do not use the Trex unit to power a WirelessHART device. Providing power to a WirelessHART device may damage the device.
Device connection wizard prompts Answer
Do you intend to provide power from the Trex unit?
Leads are attached to:
No
Transmitter
Change Polling Option? Tap Yes if the device is not at address
zero.
Figure 3-13: Connect to an externally-powered 2-wire HART transmitter
If the transmitter is at address zero, the Trex unit may automatically detect and connect to the device without any prompts from the device connection wizard.
A — Voltage source
Device connection wizard prompts Answer
Do you intend to provide power from the Trex unit?
No
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Device connection wizard prompts Answer
Leads are attached to:
Change Polling Option? Tap Yes if the device is not at address zero.
Transmitter
Figure 3-14: Connect to an externally-powered 2-wire HART transmitter and use the Trex internal resistor
Note
The Trex unit must be connected in series with the transmitter to use the internal resistor. Do not put more than 25V DC on the circuit.
A — Voltage source
Device connection wizard prompts Answer
Do you intend to provide power from the Trex unit?
Leads are attached to:
Change Polling Option? Tap Yes if the device is not at address zero.
Increase loop resistance? Tap Yes to enable the internal resistor.
No
Transmitter
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Figure 3-15: Connect to a 4-wire HART transmitter
If you have a 250 Ohm resistor, you can insert it in between the device terminals and connect the lead set across the resistor. Otherwise, you can enable the internal resistor in the device connection wizard.
Note
Ensure you review the device documentation for connecting/setting up HART communication. Devices may have different terminals or requirements.
A — Voltage source
Device connection wizard prompts Answer
Do you intend to provide power from the Trex unit?
Leads are attached to:
Change Polling Option? Tap Yes if the device is not at address zero.
Increase loop resistance? Tap Yes if there is no external resistor between the
No
Transmitter
device terminals.
Figure 3-16: Power and connect to a HART positioner
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Device connection wizard prompts Answer
Do you intend to provide power from the Trex unit?
Are you providing power to a transmitter or positioner?
Change Polling Option? Tap Yes if the device is not at address zero.
Increase loop current? Tap Yes to increase the current from 4 mA to
Yes
Positioner
another value, if the device did not initially communicate.
Figure 3-17: Connect to an externally-powered HART positioner
A — Current source
Device connection wizard prompts Answer
Do you intend to provide power from the Trex unit?
Leads are attached to:
Change Polling Option? Tap Yes if the device is not at address zero.
Increase loop current? Tap Yes to increase the current from 4 mA to
No
Positioner
another value, if the device did not initially communicate.
Related information
HART communication terminals Connect to an externally-powered HART device Power and connect to a HART device Internal resistors
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3.10.3 Wiring diagrams for the Smart Wireless THUM™ Adapter and the Field Communicator application

Below each diagram, a table lists the expected prompts from the device connection wizard and the answers to select to complete the connection.
If you are using a WirelessHART adapter that is not the Smart Wireless THUM adapter, review its documentation before connecting the Trex unit.
Note
• Ensure you review the documentation included with the THUM adapter for additional
information.
• The Trex unit acts as a secondary HART master on a HART loop.
CAUTION
Remove the USB cable from the Trex unit before connecting to a device.
Figure 3-18: Power the THUM adapter without a device attached and use 250 Ohm resistor
Connect the lead set to the red and black wires.
Device connection wizard prompts Answer
Do you intend to provide power from the Trex unit?
Are you providing power to a transmitter or positioner?
Change Polling Option? Tap Yes and select the address for the
Yes
Positioner
Select Positioner because the Trex unit needs to control/limit current due to the lower value of the resistor.
THUM adapter.
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Figure 3-19: Power and communicate with the THUM adapter attached to a HART transmitter
Note
If you want to communicate with the THUM adapter rather than the device, ensure the Auto-Connect option for the Field Communicator Settings is disabled. This allows the Field Communicator application to detect both the THUM adapter and the transmitter, and let you select which one to communicate with.
Device connection wizard prompts Answer
Do you intend to provide power from the Trex unit?
Are you providing power to a transmitter or positioner?
Change Polling Option? Tap Yes and select the address for the
Yes
Transmitter
THUM adapter, the device, or "0,63" for both.
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Figure 3-20: Communicate with the THUM adapter attached to a powered HART transmitter
Connect the lead set to the yellow and white wires.
Note
If you want to communicate with the THUM adapter, ensure the Auto-Connect option for the Field Communicator Settings is disabled. This allows the Field Communicator application to detect both the THUM adapter and the transmitter, and let you select which one to communicate with.
A. Optional connection if the yellow and white wires are inaccessible.
B. Voltage source.
Device connection wizard prompts Answer
Do you intend to provide power from the Trex unit?
Leads are attached to:
Change Polling Option? Tap Yes and select the address for the
No
Transmitter
THUM adapter, the device, or "0,63" for both.
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Figure 3-21: Communicate with the THUM adapter powered by a voltage source
Connect the lead set to the yellow and white/black wires.
A. Voltage source.
Device connection wizard prompts Answer
Do you intend to provide power from the Trex unit?
Leads are attached to:
Change Polling Option? Tap Yes and select 63.
No
Transmitter
Figure 3-22: Communicate with the THUM adapter powered by a current source
Connect the lead set to the yellow and white/black wires. The 250 Ohm resistor is not required, but it may be used to verify current.
A. Current source.
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Device connection wizard prompts Answer
Do you intend to provide power from the Trex unit?
Leads are attached to:
Change Polling Option? Tap Yes and select 63.
No
Positioner

3.10.4 HART Device List

The Device List displays the devices that the Trex unit has detected. Each device is listed by its tag and address. The Device List will not display when the Auto-Connect option for the Field Communicator application is enabled and a device was found at address zero.
Tap a device displayed on the Device List to connect to it. If a device is not listed, tap My Device Not Found to change the HART polling options.
Figure 3-23: HART Device List
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3.11 Internal resistors

The Trex unit has internal resistors that can be used when the Trex unit powers a HART transmitter, or when the HART transmitter is on a 4-20 mA current loop without a resistor. The resistors are enabled through the device connection wizard in the Field Communicator application.
Note
For positioners, the internal resistors in the Trex unit are disabled.
Available resistors
Resistor Use
167 Ohm Used when the Trex unit powers a HART transmitter. This is the only resistor
that is available when the Trex unit powers a transmitter. The 167 Ohm resistor is available due to Intrinsic Safety limitations when
the Trex unit powers a device. If the current is high (for example 22.5 mA), the voltage drops to a level that may not be enough to power the device. The use of the lower valued resistor can reduce the amount of the voltage drop. The HART signal is lower, but the shout/deaf mode helps increase the HART signal amplitude for devices that do not meet the HART specifications.
250 Ohm Used when you select to increase loop resistance in the device connection
wizard when connecting to a device on an externally-powered 4-20 mA current loop.
500 Ohm Used when the Trex unit detects the current is too high for the 250 Ohm
resistor on an externally-powered 4-20 mA current loop. If the current continues to be too high after adding this resistor, the Trex unit displays an error message indicating the detected current exceeds the capacity of the resistor. The 500 Ohm resistor is used for externally-powered current loops.
Connection to a transmitter powered by the Trex unit
To enable the 167 Ohm resistor, the Trex unit must be connected to the device using the HART + pwr terminals.
Figure 3-24: Connection for using the Trex internal resistor when the Trex unit powers the transmitter
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Connections to externally-powered transmitters
To enable the internal resistors, the Trex unit must be connected to the device/loop in a specific way.
For externally-powered 2-wire HART devices, the Trex unit must be connected in series. In the diagram below, the Trex internal resistor is enabled in the HART terminals.
Figure 3-25: Connection for using the Trex internal resistor for an externally-powered 2-wire transmitter
A. Voltage source
For 4-wire transmitters, the Trex unit must be connected in parallel. In the diagram below, the Trex internal resistor is enabled in the HART terminals.
Figure 3-26: Connection for using the internal resistor for a 4-wire transmitter
A. Voltage source
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3.11.1 Enable or disable the internal resistors

If the Trex unit is powers the transmitter, there is no prompt/option to enable or disable the internal 167 Ohm resistor. The Trex unit automatically applies the resistor when you enable power to a transmitter from the device connection wizard.
If the Trex unit is connected to an externally-powered HART transmitter, the device connection wizard prompts you if you want to increase loop resistance. The Trex unit then selects the 250 Ohm or 500 Ohm resistor; you cannot select a specific value. The selected resistor value is not displayed on the screen.
Procedure
1. If you want the Trex unit to power a 2-wire HART transmitter, do the following: a) Connect the lead set to the HART + pwr terminals on the Trex unit and to the
communication terminals on the device.
Figure 3-27: Connection for providing power to a 2-wire HART transmitter
b) In the Field Communicator application, tap HART.
c) Tap Yes when asked if you intend to provide power.
d) Tap Transmitter. The Trex unit applies the internal resistor.
e) Follow any additional prompts to connect to the device.
2. If the Trex unit is connected to an externally-powered 2-wire HART transmitter, do
the following:
a) Connect the lead set to the HART terminals on the Trex unit and to the
communication terminals on the device in-series. (If you are connecting to a 4-wire transmitter, connect the Trex unit in parallel.)
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Figure 3-28: Connection for an externally-powered 2-wire transmitter
A. Voltage source
b) Tap HART.
c) Tap No when asked if you intend to provide power.
d) Tap Transmitter.
e) Tap No when asked if you want to change polling. (This assumes the device is
at address zero.)
f) Tap Yes when asked if you want to increase loop resistance.
g) Tap Next.
A message is displayed to indicate the internal resistor is being enabled.
3. To disable the internal resistor, disconnect the device from the Trex unit, or close
the Field Communicator application.

3.12 Power and connect to a HART device

The Trex unit can provide up to 16 volts (at 22.5 mA) to power a HART device. The Trex unit must have the Device Communicator Plus communication module to power a HART device (transmitter or positioner).
You do not need to add an external resistor. The Trex unit has a 167 Ohm internal resistor in the HART + pwr terminals that is used when the Trex unit powers the transmitter.
If you try to apply power from the Trex unit when the device is externally-powered, the Field Communicator application prevents the Trex unit from supplying power. This protects the Trex unit from damage.
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CAUTION
• The Trex unit cannot power a 4-wire device. Do not connect Trex unit to the power
terminals of a 4-wire device. This can blow a fuse inside the Trex unit. The repair/ replacement will need to be completed at an authorized service center.
• Remove the USB cable from the Trex unit before connecting to a device.
• Do not use the Trex unit to power a WirelessHART device. Providing power to a
WirelessHART device may damage the device.
WARNING
Do not add any external power to the device when the Trex unit is powering the device. This can blow a fuse inside the Trex unit. The repair/replacement will need to be completed at an authorized service center. Ensure the device is disconnected from the loop/segment and no other wires are connected to the device before providing power from the Trex unit.
Procedure
1. Connect the lead set to the HART + pwr terminals on the Trex unit and to the
communication terminals on the device.
Figure 3-29: Power a HART transmitter
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Figure 3-30: Power a HART positioner
2. In the Field Communicator application, tap HART.
3. Tap Yes when prompted if you want the Trex unit to power the device.
4. Tap Transmitter or Positioner.
If you selected Positioner, the Trex unit provides power and 4 mA.
5. 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. For a positioner, you may be asked to increase current (mA) to increase the value from the original 4 mA. The Online menu or the device dashboard displays, depending on the device type.
Related information
Wiring diagrams for HART devices and the Field Communicator application Wiring diagrams for the Smart Wireless THUM™ Adapter and the Field Communicator
application Disconnect a device HART communication terminals Internal resistors

3.12.1 Power and connect to a Smart Wireless THUM adapter

The Trex unit must have the Device Communicator Plus communication module to power a THUM adapter.
When performing a bench configuration, the THUM adapter should be attached to a device. However, the Trex unit can power a THUM adapter when it is not connected to a HART device.
To connect to a device that has a THUM adapter attached, see Connect to an externally-
powered HART device or Power and connect to a HART device.
CAUTION
Remove the USB cable from the Trex unit before connecting to a device.
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Procedure
1. Connect the lead set to the HART + pwr terminals on the Trex unit and the red/black
wires on the THUM adapter.
Figure 3-31: THUM adapter wiring with 250 Ohm resistor
2. In the Field Communicator application, tap HART.
3. Tap Yes when prompted if you want the Trex unit to power the device.
4. Tap Positioner.
5. When prompted, change the polling address to 63.
6. Follow any additional prompts to connect to the THUM adapter.
The device menu is displayed.
Related information
HART communication terminals Wiring diagrams for the Smart Wireless THUM™ Adapter and the Field Communicator
application Disconnect a device

3.13 Connect to an externally-powered HART device

By default, the Trex unit tries to automatically connect to the device at address zero. See
Automatically connect to a HART device for more information.
CAUTION
Remove the USB cable from the Trex unit before connecting to a device.
Note
The Trex unit acts as a secondary HART master on a HART loop.
Procedure
1. Connect the lead set to the HART terminals on the Trex unit and to the
communication terminals on the device. See the HART wiring diagrams topic for the connection details. If you want to use the Trex internal resistor, connect the Trex unit is series with the device.
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2. Open the Field Communicator application.
The Trex unit may automatically detect or connect to the device.
3. 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.
4. To disconnect a device, tap Menu → Disconnect, or remove the lead set.
Related information
Wiring diagrams for HART devices and the Field Communicator application Wiring diagrams for the Smart Wireless THUM™ Adapter and the Field Communicator
application Disconnect a device HART communication terminals Internal resistors

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 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.
Related information
Status bar
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3.14.2 Device Setup options

The Device Setup menu accesses every configurable parameter for the connected device. Some devices may not display a Device Setup menu or it may display different options. The list below is a general overview of the options. See the device documentation for more information.
Tap Device Setup to view the process variables, diagnostics and service, basic setup, detailed setup, and review menus.
Process Variables
The Process Variables menu lists all process variables and their values. Process variables are continuously updated.
Diagnostics and Service
Option Description
Diagnostics and Service Run device and loop tests as well as calibration options. The
diagnostics and service operations that are available vary widely from device to device and are defined in the device description.
Test device View the status as well as self and master test of the device. Test
device initiates a diagnostic routine at the device and can report an electronics failure, as well as other failures that can affect performance.
Loop test Set the output of the device at a specified analog value, and test the
integrity of the loop and the operation of indicators, recorders, or similar devices in the loop.
Calibration Perform such operations a sensor trim, D/A trim, and scaled D/A trim.
Basic Setup
The options in the Basic setup menu are the most fundamental tasks that can be performed with a device. These tasks are a subset of the options available under the Detailed setup menu.
Option Description
Tag Modify the tag for the device.
Unit Select the engineering units that are displayed.
Damping Change the response time of the transmitter. It is often used to
smooth the output when there are rapid input variations.
Range values Modify the analog output scaling.
Detailed Setup
The Detailed setup menu provides access to every editable device parameter and all device functions. The Detailed setup menu varies from one HART device to another. Functions in this menu can include tasks such as characterization, configuration, and sensor and output trims.
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Review
The Review menu lists all the static parameters read from the connected device, including information about the device and sensor setup and limitations. It may also include information about the connected device such as tag, materials of construction, and device software revision.

3.14.3 Changing device parameters

When you change a parameter for a device, the Field Communicator application highlights the changed parameter yellow until you send the change to the device. You can send one or more changes to a device.
Figure 3-32: Changed parameter is highlighted yellow

3.14.4 Change a HART device parameter

You can modify one or more parameters and then send the changes to the device.
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Procedure
1. Connect to the HART device.
2. Go to the parameter you want to change.
See the device documentation for more information. Each device has different menus.
3. Make the desired change.
The changed parameter is highlighted yellow.
4. Tap OK.
5. Tap the Send icon in the upper right corner.
A list of all the changes you made is displayed.
6. Review the change.
Tap Discard to undo the change and close the screen. Tap Cancel to keep the change and send it to the device at a later time.
7. Tap Send.
The change is sent to the device. The yellow highlight is removed from the changed parameters.

3.14.5 Edit a HART configuration

Prerequisites
Note
Do not edit a configuration on the Trex unit while you are connected to the Configuration Management PC application.
Procedure
1. In the Field Communicator application, tap HART Offline.
2. Tap Offline Config → Edit Existing.
3. Tap the column heading to sort configurations by File Name or Tag. Select the
configuration you want to edit, and tap OK.
4. Select and edit the parameters.
5. Tap the checkbox to mark the parameter for writing.
Note
Unmarked parameters are saved but not sent when you transfer the configuration to a connected device.
6. Tap Save when you finish editing the parameters.
7. If necessary, enter a new configuration name.
8. Tap OK.

3.14.6 Display the HART short tag or long tag

You can select the HART short or long tag to display for HART revision 6 or higher devices. By default, HART revision 7 devices display the long tag. The option will not display for earlier devices.
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Note
The selected tag is not retained the next time you connect to the device. You need to select the desired tag each time you connect the device.
If you want to change the value of the HART tag, see the device documentation for more information. The location of these tag parameters varies because it is determined by the device manufacturer.
Procedure
1. Connect to the HART device.
2. Tap the tag that is displayed on the top of the screen.
Figure 3-33: Tap the device tag
3. Select Tag or Long Tag.
The displayed tag changes.
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3.14.7 View device alerts

Procedure
1. Connect to a HART device.
2. If the device has alerts, tap Alerts at the top of the screen.
The list of alerts is displayed.
Figure 3-34: Alerts button
3. Tap OK.

3.14.8 Send a configuration to a connected HART device

Prerequisites
You must have at least one configuration saved in the Trex unit for the connected device type.
Procedure
1. Connect to the HART device.
2. Tap the Menu tab in the application bar.
3. Tap Send Config.
4. Select a saved configuration, and tap OK.
5. Review the parameters, and tap Send.

3.14.9 Save a configuration from a HART device

You can save a copy of the configuration from the connected device. The configuration has only non-dynamic parameters.
Procedure
1. Connect to the HART device.
2. Tap the Menu tab.
3. Tap Save Config.
4. Enter a filename for the configuration, and tap OK.
The configuration is saved in the Trex unit.
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3.15 Offline HART configurations

The Trex unit lets you work with HART configurations. You can create, edit, copy, delete, and rename configurations.
If you are not connected to a HART device, an Offline Config button displays on the main Field Communicator menu. You can edit and store a configuration on the Trex unit.
If you are connected to a HART device, you can either Save Config to the Trex unit, or Send Config to the connected device.
You can also back up the configurations to a PC by using the Configuration Management application. For more information, see the Help included with the Configuration Management application.
Note
Do not edit a configuration on the Trex unit while you are connected to the Configuration Management PC application.

3.15.1 Create a HART configuration

Create a new configuration for a specific device type and revision. You can then apply this configuration to multiple devices.
Procedure
1. In the Field Communicator application, tap HART Offline.
2. Tap Offline Config → New.
3. Tap a manufacturer.
4. Tap a device type.
5. Tap a device revision.
6. Tap OK.
7. Select and edit the necessary parameters.
8. Tap OK to mark the parameter for writing.
Note
Unmarked parameters are saved but not sent when you transfer the configuration to a connected device.
9. Tap Save when you finish editing the parameters.
10. Enter a name for the configuration, and tap OK. The configuration file is saved.

3.15.2 Edit a HART configuration

Prerequisites
Note
Do not edit a configuration on the Trex unit while you are connected to the Configuration Management PC application.
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Procedure
1. In the Field Communicator application, tap HART Offline.
2. Tap Offline Config → Edit Existing.
3. Tap the column heading to sort configurations by File Name or Tag. Select the configuration you want to edit, and tap OK.
4. Select and edit the parameters.
5. Tap the checkbox to mark the parameter for writing.
Note
Unmarked parameters are saved but not sent when you transfer the configuration to a connected device.
6. Tap Save when you finish editing the parameters.
7. If necessary, enter a new configuration name.
8. Tap OK.

3.15.3 Copy a HART configuration

You can create a copy of a saved configuration.
Procedure
1. In the Field Communicator application, tap HART Offline.
2. Tap Offline Config → Copy.
3. Select the configuration you want to copy, and tap OK.
4. Enter a name for the new copy of the configuration, and tap OK.
5. Tap OK when asked if you want to copy the file. The configuration is copied and saved to the Trex unit.

3.15.4 Rename a HART configuration

Procedure
1. In the Field Communicator application, tap HART Offline.
2. Tap Offline Config → Rename.
3. Select the file to rename, and tap OK.
4. Enter a new name for the configuration, and tap OK.
5. Tap OK when asked if you want to rename the configuration. The configuration is renamed.

3.15.5 Delete a HART configuration

Procedure
1. In the Field Communicator application, tap HART Offline.
2. Tap Offline Config → Delete.
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3. Select the file to delete, and tap OK.
4. Tap OK when asked if you want to delete the file. The file is deleted.

3.16 Favorites

You can add the most commonly used HART menu items to a list of favorites for quick access. (This feature is similar to the favorites/bookmark feature in a web browser.) You can add menus (with submenus), methods, or variables to the favorites. The list of favorites is specific to a device revision. It does not include items added from multiple types of devices.
If the device description for the device has predefined favorites, they are available from the Favorites screen. Also, some devices may include additional menu items in the favorites list.

3.16.1 Open a menu item from the favorites list

The Favorites option is supported for only HART devices.
Procedure
1. Connect to a HART device.
2. Tap Menu → Favorites. The Trex unit displays the list of favorites for the device.
3. Tap a saved favorite to open that menu item.

3.16.2 Add a menu item to the favorites list

Add a menu item for a HART device to the favorites for quick access.
Procedure
1. Connect to a HART device.
2. Go to the menu item you want to add to the favorites.
3. Press the menu item for 2 seconds. A menu appears.
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Figure 3-35: Favorites menu
4. Tap Add To Favorites. The menu item is added to the favorites.
5. To verify the option was added, go to Menu → Favorites.

3.16.3 Remove a menu item from the favorites list

Note
Some devices have default options, such as tag or range values, already in the favorites list. You cannot remove these default options. You can only remove options you added to the favorites list.
Procedure
1. Connect to a HART device.
2. Tap Menu → Favorites.
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3. Press and hold a menu item displayed in the Favorites list.
4. Tap Remove From Favorites.

3.17 Polling options for HART devices

The Field Communicator application uses the HART polling options to search for connected devices. By default, the Trex unit searches for a device at address zero and automatically connects to the device, if it is detected. Most HART device installations contain one device per HART loop and the device address is zero. Multidrop mode is enabled by changing the address from zero to any address between 1 and 63. See the device documentation for more information about changing a device address.
If the Trex unit cannot find the device at address zero, the device connection wizard displays a message asking if you want to change the polling option.
The Trex unit can poll by:
• Address - Select an address (0-63).
• Tag - Enter the tag of the device.
• Long Tag - Enter the long tag of the device.
Note
If the Trex unit polls addresses greater than 15 on a loop with HART Universal Revision 5 devices, those devices may appear at multiple addresses.
Note
If you have two devices on a HART loop and one device is at address zero, disable the Auto­Connect option in the Trex Settings. Otherwise, the Trex unit automatically connects to
the device at address zero and does not detect the second device.

3.17.1 Set the polling options for HART devices

When you connect to a device, the Trex unit by default automatically polls address zero and connects to the device at that address. If the Trex unit does not find a device at address zero, you are prompted to change the polling address in the device connection wizard.
If you change the polling option, the selected option is not saved. You need to select the desired option each time you connect to a device.
Note
If you have two devices on a HART loop and one device is at address zero, disable the Auto­Connect option in the Trex Settings. Otherwise, the Trex unit automatically connects to
the device at address zero and does not detect the second device.
Procedure
1. Connect the lead set to the Trex unit and to the device.
2. Open the Field Communicator application.
3. If the Trex unit does not automatically connect to the device, tap HART.
4. Follow the prompts to connect to the device.
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5. Tap Yes when prompted if you want to change the polling option.
6. Select a polling option at the top of the screen.
Option Description
Address
Tag
Long Tag
Poll for devices at the specified addresses.
• Address 0 : Poll non multi-dropped loops. This is the default option.
• Address Range 0 to 15 : Poll HART Universal Revision 5 or earlier
devices on multi-dropped loops.
• Address Range 0 to 63 : Poll HART Universal Revision 6 or newer
devices on multi-dropped loops.
• Address 63 (wireless adapter) : Poll the default address for
WirelessHART adapters.
• Address 0 and 63 (wireless adapter) : Poll address 0 and the
default address for WirelessHART adapters.
• Custom : Poll a unique or non-consecutive group of addresses
(example: “0, 5-7, 12”). Use a hyphen to specify consecutive addresses and/or a comma to separate numbers or groups of numbers.
Poll by the tag of the device.
Poll by the long tag of the device. (Only supported in HART Universal Revision 6 or higher devices.)

3.18 Connections to FOUNDATION fieldbus devices

Connect the Trex unit to the device by using the lead set and the appropriate terminals. An error message appears if the lead set is connected incorrectly. Digital communication is susceptible to electrical noise; follow proper wiring instructions.
Note
Dynamic variables shown while online represent the digital data being sent from the device.

3.18.1 Precautions for using the Trex unit with FOUNDATION fieldbus devices

WARNING
If a fieldbus segment is connected to a host system, the changes made with the Trex unit may not be recorded in the host system’s permanent database. Verify the changes in the database. Otherwise, this could cause unpredictable results and, depending upon your application, process disruption leading to property damage, serious injury, or death. Ensure all safety precautions and work procedures have been followed.
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WARNING
Changing device parameters could adversely affect the control of your process. Put the control loop in Manual/Out of Service before applying changes. Verify the output before returning the control loop to Auto. Failure to do so could result in property damage, serious injury, or death. Ensure all safety precautions and work procedures have been followed.
CAUTION
The Trex unit draws approximately 12 mA from the fieldbus segment when it is online. (The Trex unit draws 0 mA when it is offline.) Ensure the power supply or barrier on the fieldbus segment has the capacity to provide this additional current when the Trex unit is online. If a heavily loaded fieldbus segment is drawing near the capacity of the segment’s power supply, connecting the Trex unit may result in loss of communication.

3.18.2 FOUNDATION fieldbus communication terminals

The Trex unit has terminals that enable communication with FOUNDATION fieldbus devices. Insert the lead set into the FF terminals and connect to a FOUNDATION fieldbus device or to a connection point on the fieldbus segment.
On the Device Communicator Plus communication module, the red FF pwr terminal enables the Trex unit to power one FOUNDATION fieldbus device. To use this terminal, you need the FOUNDATION fieldbus Power Plug that connects to the FF pwr terminal and the positive (red) FF terminal. This lets the Trex unit communicate with and power one FOUNDATION fieldbus device.
Figure 3-36: FOUNDATION fieldbus Power Plug attached to the Trex unit
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