Polling For Foundation Fieldbus Devices; Set A Foundation Fieldbus Device To Be A Link Master Or Basic Device - Emerson AMS Trex User Manual

Field Communicator application
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3.21.9

Polling for FOUNDATION fieldbus devices

When you connect the Trex unit to a FOUNDATION fieldbus device, the Field
Communicator application polls the most common addresses for a fieldbus segment. You
cannot set a specific range or a specific address. If the device is not detected, tap the My
Device Not Found option to have the Field Communicator application automatically expand
the polling range, if the Trex unit is the LAS. This option expands the following settings:
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3.21.10 Set a FOUNDATION fieldbus device to be a link master or
basic device
If a device can be a Link Active Scheduler (LAS), the Link Master Configuration menu option
displays in the Service Tools menu. Select Master if you want the device to attempt to be
the LAS, or select Basic to prevent the device from becoming the LAS. After you set the
option, the Trex unit disconnects from the device.
Setting the device as a link master does not set the device as the LAS. The link master
device must follow the process to become the LAS if other link master devices are on the
fieldbus segment.
Note
You cannot change the device to be a link master or basic device when a host/linking device is
detected on the fieldbus segment. To change the device to be a link master or basic device, use the
host system or remove the device from the fieldbus segment and connect it directly to the Trex unit.
Procedure
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Tap OK on the message that indicates the device has been disconnected from the
Trex unit.
The Device List appears and displays the device at the new address.
Tap the device to connect to it.
Polling addresses - By default, the Trex unit polls addresses 0-48 and 232-255. This
range is then expanded to include all valid fieldbus addresses.
Slot time - The slot time is increased to enable the Trex unit to find older
FOUNDATION fieldbus devices on the fieldbus segment.
Connect to the FOUNDATION fieldbus device.
Tap Service Tools.
Tap Link Master Configuration.
Tap OK when prompted that the device will be restarted after the parameter is
changed.
Tap Yes or No when asked if the device is commissioned.
You cannot make changes if the device is commissioned.
User Guide