BERTHOLD TECHNOLOGIES Uni-Probe LB 490, User Manual

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1 System Description Volume 2
1.1.2 Device Communication
Communication with the PCS
1
Communication with display, evaluation and control devices takes
place via a 2-wire HART
®
current interface with modulated digital
current signal (FSK-modulation of the current signals according to
the Standard Bell-202).
The level data are supplied as isolated 4-20mA current signal to
the process control system PCS.
Configuration and monitoring
Configuration, parameter setting and calibration of the Uni-Probe,
as well as the output and display of the digital units of measure are
carried out either:
• via a hand-held terminal, e.g. the HART
®
Communicator made
by Fisher-Rosemount Systems, or
• via PC with FDT frame application or
• via PC and the SIMATIC PDM software.
In order to monitor the Uni-Probe via PC (PC in the control room or
notebook in the field), the SIMATIC PDM software made by
SIEMENS including the Uni-Probe Device Description provided by
BERTHOLD TECHNOLOGIES has to be installed on the respective
PC.
As an alternative, the Uni-Probe may also be operated via a FDT
frame application, e.g. PACTware
TM
. The required DTM for the user
interface is available from Berthold Technologies.
Volumes 3, 4 and 5 describe the types of communication:
– Volume 3: HART
®
Communicator User Interface
– Volume 4: PACTware
™
User Interface FDT/DTM
– Volume 5: SIMATIC PDM User Interface HART
®
1.1.3 Measuring Geometries
The hardware and software of the Uni-Probe LB 490 system makes
it easy to adapt the system to different measuring geometries and
measuring tasks. Therefore, the settings and parameters of the
measuring device have to be defined with care for the particular
measuring task.
Important parameters may not be changed during operation. The
system must be taken into operation and settings changed only by
persons who know how to work with the device. Therefore, all
users should read these operating instructions carefully. BERTHOLD
TECHNOLOGIES, therefore, recommend documenting all settings in
a setup protocol.
This User’s Manual describes several possible measuring arrange-
ments and instrument versions (see Volume 2, section 1.4).
The best system configuration is selected for each measuring task
during the planning stage. Therefore, the specific project documen-
tation has to be observed and followed.
1. PCS = process control system