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Fieldbus functionality
Displaying device information
NOTE
The physical device tag and address of a device are read-only when
the device is commissioned or, at a minimum, any of the following
hosts/linking devices are detected on the segment: Rosemount 3420,
DeltaV, Ovation, Allen-Bradley FFLD and FFLDC, Honeywell Experion
PKS, Yokogawa Stardom or CENTUM, Softing FG-100/HSE, or SMAR
DF62. To change the device tag or address, use the host system or
remove the device from the segment and connect it directly to the 475
Field Communicator.
To display the Physical Device Tag, Device Address, Device ID, and
the Device Revision:
1.Display the Live Device List; see page 65.
2.Double-tap a device.
3.Double-tap Advanced.
4.Double-tap Detail.
5.Double-tap one of the following options:
• Physical Device Tag designates a device's identity in the system.
• Address is the data link layer node address of the device. The host
control system has the ability to assign an address to a device when
it is connected to a segment. When assigning device addresses,
follow the guidelines below:
• Valid device addresses for fieldbus devices are 20 through 247
with the exception of the addresses between V(FUN) and
V(FUN) + V(NUN)-1 parameters as defined for the 475; see
"Changing the fieldbus polling addresses" on page 75. These
parameters are available in the Polling menu.
• Addresses between 16 and 19 are usually reserved for host
systems. A device should not be assigned in this address
range.
• Addresses below 16 are not available.
• Addresses between 248 and 251 are temporary addresses.
Devices without a tag or address appear on the segment at
these addresses.
• Addresses in the range 252 to 255 are reserved for visitors,
such as the 475 Field Communicator.
• Device ID is the unique number identifier for each device. It is set by
the device manufacturer and cannot be changed.
• Device Revision is the manufacturer revision number. It is used by
an interface device to locate the device description and cannot be
changed.
71
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