Ams trex™ Device Communicator

Related information
Wiring diagrams for FOUNDATION fieldbus devices and the Field Communicator
application
Disconnect a device
3.20
Connect to an externally-powered
FOUNDATION fieldbus device
The Trex unit may automatically display the device on the Device List if the device is on a
fieldbus segment that has a host system or a FOUNDATION fieldbus device that is the LAS.
The Trex unit will become the LAS if it is connected to an externally-powered
FOUNDATION fieldbus device on a fieldbus segment with no communications.
 CAUTION
Remove the USB cable from the Trex unit before connecting to a device.
Procedure
1. Connect the lead set to the FF terminals on the Trex unit and the device.
Figure 3-43: Example of connection to the fieldbus segment
A. Terminators
B. Power conditioner
C. Fieldbus power supply
D. Host system
2. Open the Field Communicator application.
3. If the Trex unit does not automatically find the device, tap 
Fieldbus
on the Connect
- Select screen.
4. From the 
Device List
, tap the desired device.
The device menu is displayed.
5. To disconnect a device, tap 
Menu
→
Disconnect
, or remove the lead set.
User Guide 
Field Communicator application
September 2021
User Guide 
107

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Related information
Wiring diagrams for FOUNDATION fieldbus devices and the Field Communicator
application
Disconnect a device
3.21
Online FOUNDATION fieldbus devices
3.21.1
Limitations for commissioned devices
The Trex unit prevents you from completing some tasks on commissioned devices that
could adversely affect the control system. You cannot do the following on a commissioned
device:
•
Schedule blocks
•
Change the link master configuration
•
Change the block tag
•
Change the device tag
•
Change the device address
3.21.2
Device blocks
Many FOUNDATION fieldbus devices organize the device parameters into separate blocks.
The Online menu displays block information for the connected FOUNDATION fieldbus
device. Devices may have a resource and transducer block, and other device-specific
blocks. (Other devices may display their parameters using a device dashboard.)
Note
If you previously instantiated a block in a device, the Trex unit may not display that block.
The Trex unit does not support block instantiation.