Emerson 475, User Manual

Page: 53 / 114

www.fieldcommunicator.com
U
SER
’
S
M
ANUAL
August 2009
475 F
IELD
C
OMMUNICATOR
S
ECTION
4 F
IELDBUS
F
UNCTIONALITY
OVERVIEW
This section provides instruction on basic fieldbus functionality in the 475 Field
Communicator. It is based on the operation of the F
OUNDATION
Fieldbus Application
version 5.0.
SAFETY MESSAGES
Procedures and instructions in this section may require special precautions to ensure
the safety of the personnel performing the operation. Information that raises potential
safety issues is indicated by a warning symbol (
). Refer to the safety messages
before performing an operation preceded by this symbol. Other warning messages can
be found in the Troubleshooting section of this manual.
WARNING
If a segment is connected to a host system, the changes made with the 475 Field
Communicator may not be recorded in the host system’s permanent database. Verify the
changes in the database. Otherwise, this could cause unpredictable results and, depending
upon your application, process disruption leading to property damage, serious injury, or
death. Ensure all safety precautions and work procedures have been followed.
WARNING
Changing device parameters could adversely affect the control of your process. Put the
control loop in Manual/Out of Service before applying changes. Verify the output before
returning the control loop to Auto. Failure to do so could result in property damage, serious
injury, or death. Ensure all safety precautions and work procedures have been followed.
WARNING
The 475 Field Communicator draws approximately 12 mA from the fieldbus segment. Be
sure the power supply or barrier on the fieldbus segment has the capacity to provide this
additional current. If a heavily loaded fieldbus segment is drawing near the capacity of the
segment’s power supply, connecting the 475 Field Communicator may result in loss of
communication.