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.
Fieldbus block modes
The resource, transducer, and all function blocks in the device have modes of operation.
These modes control the operation of the block. Every block supports both automatic
(Auto) and out of service (OOS) modes. Other types of modes that may also be supported
are Cas, RCas, ROut, IMan and LO.
You can change the mode by tapping the mode button that is displayed at the top of the
screen. The mode button displays the fieldbus logo and lists the current mode for the
block.
Mode Description
Auto The functions performed by the block will execute. If the block has any
outputs, these will continue to update. This is typically the normal
operating mode.
Field Communicator application User Guide
September 2021
108 User Guide
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