Emerson 375 User Manual page 77

Fieldbus Functionality
• Physical Device Tag designates a field 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. The following should be taken into
consideration when assigning device addresses:
• 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 as defined for the 375; see
"Configuring the Fieldbus application" on
page 4-21. 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 will come up on the segment at these
addresses.
• Addresses in the range 252 to 255 are
reserved for visitors, such as the 375 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 file for the resource and cannot be
changed.
4. Using the SIP keyboard, enter the new information.
5. Tap OK.
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