Emerson Rosemount 248, Справочное руководство

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24
Reference Manual
00809-0100-4825, Rev CB
Section 3: Configuration
March 2014
Configuration
3.2 Commissioning
The Rosemount 248 must be configured for certain basic variables to operate. In many cases, all
of these variables are pre-configured at the factory. Configuration may be required if the
transmitter is not configured or if the configuration variables need to be revised.
Commissioning consists of testing the transmitter and verifying transmitter configuration data.
The Rosemount 248 can be commissioned before (off-line) or after (on-line) installation. During
on-line configuration, the transmitter is connected to a Field Communicator and data is entered
into the working register of the communicator and sent directly to the transmitter. Off-line
configuration consists of storing configuration data in a Field Communicator while it is not
connected to a transmitter. Data is stored in nonvolatile memory and can be downloaded to the
transmitter at a later time. Commissioning the transmitter on the bench before installation
using a Field Communicator or AMS
™
Suite: Intelligent Device Manager ensures that all
transmitter components are working.
To commission on the bench, connect the transmitter and the Field Communicator (or AMS) as
shown in
Figure 2-6 on page 16 . Make sure the instruments in the loop are installed according to
intrinsically-safe or non-incendive field wiring practices before connecting in an explosive
atmosphere. Connect Field Communicator or AMS leads at any termination point in the signal
loop. Connect the communication leads to the “COMM” terminals located on the terminal
block. Do not connect to the “TEST” terminals. Then set the transmitter jumpers to avoid
damage caused by the plant environment.
3.2.1 Setting the loop to manual
When sending or requesting data that could disrupt the loop or change the output of the
transmitter, set the process application loop to manual. The Field Communicator will prompt to
set the loop to manual when necessary. Acknowledging this prompt does not set the loop to
manual, it is only a reminder. Setting the loop to manual is a separate operation.
3.3 AMS
One of the key benefits of intelligent devices is the ease of device configuration. When used with
AMS, the Rosemount 248 is easily configured and provides instant and accurate alerts and
alarms. The screens use a color-coding for a visual indication of the transmitter health, and to
indicate any changes that may need to be made or written to the transmitter.

Gray screens: indicates that all information has been written to the transmitter

Yellow on screen: changes have been made in the software but not sent to the
transmitter

Green on screen: all current changes on screen have been written to the transmitter

Red on screen: indicates an alarm or alert that requires immediate investigation