Rosemount 248, Справочное руководство

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Reference Manual
00809-0100-4825, Rev BB
August 2005
Rosemount 248
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 revision.
Commissioning consists of testing the transmitter and verifying transmitter
configuration data. The Rosemount 248 can be commissioned either before
(off-line) or after (on-line) installation. During on-line configuration, the
transmitter is connected to a HART communicator. Data is entered in the
working register of the communicator and sent directly to the transmitter.
Off-line configuration consists of storing configuration data in a HART
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 375
Field Communicator or AMS
™
Suite: Intelligent Device Manager ensures that
all transmitter components are in working order.
To commission on the bench, connect the transmitter and the HART
Communicator (or AMS) as shown in Figure 2-6 on page 2-9. Make sure the
instruments in the loop are installed according to intrinsically-safe or
non-incendive field wiring practices before connecting a communication in an
explosive atmosphere. Connect HART 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. Set the transmitter jumpers to avoid transmitter damage
caused by the plant environment.
Setting the Loop to
Manual
When sending or requesting data that would disrupt the loop or change the
output of the transmitter, set the process application loop to manual. The
HART Communicator will prompt you to set the loop to manual when
necessary. Acknowledging this prompt does not set the loop to manual. The
prompt is only a reminder; set the loop to manual as a separate operation.
AMS
One of the key benefits of intelligent devices is the ease of device
configuration. When used with AMS, the Rosemount 248 is easy to configure
and provides instant and accurate alerts and alarms. The screens use a
color-coding to indicate to give 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
Apply AMS Changes
Right click on the device and select “Configuration Properties” from the menu.
1. From the bottom of the screen, click Apply .
2. An “Apply Parameter Modification” screen appears, enter desired
information and click OK .
3. After carefully reading the warning provided, select OK .