Endress+Hauser Proline Prowirl 72, Руководство по эксплуатации

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Proline Prowirl 72 5 Operation
E Hauser 31
5.4 Communication (HART)
In addition to via local operation, the measuring device can also be configured and measured values
obtained by means of the HART protocol. Digital communication takes place using the 4...20 mA
current output HART (see Page 25).
The HART protocol allows the transfer of measuring and device data between the HART master and
the field devices for configuration and diagnostics purposes. HART masters, such as a handheld
terminal or PC-based operating programs (such as ToF Tool - Fieldtool Package), require device
description (DD) files. They are used to access all the information in a HART device. Such
information is transferred solely via “commands”.
There are three different command classes:
• Universal commands:
All HART devices support and use universal commands. The following functionalities are linked
to them:
– Recognizing HART devices
– Reading off digital measured values (flow, totalizer, etc.)
• Common practice commands:
Common practice commands offer functions which are supported and can be executed by many
but not all field devices.
• Device-specific commands:
These commands allow access to device-specific functions which are not HART standard. Such
commands access individual field device information, (among other things), such as low flow cut
off settings etc.
!
Note!
Prowirl 72 has all three command classes. Page 32 ff. provides you with a list of all the supported
“Universal commands” and “Common practice commands”.
5.4.1 Operating options
For the complete operation of the measuring device, including device-specific commands, there are
device description (DD) files available to the user to provide the following operating aids and
programs:
HART Communicator DXR 375
Selecting device functions with a HART Communicator is a process involving a number of menu
levels and a special HART function matrix.
The HART operating instructions in the carrying case of the HART handheld terminal contain more
detailed information on the device.
Operating program “ToF Tool - Fieldtool Package”
Modular software package consisting of the service program “ToF Tool” for configuration and
diagnosis of ToF level measuring devices (time-of-flight measurement) and evolution of pressure
measuring instruments as well as the "Fieldtool" service program for the configuration and diagnosis
of Proline flow measuring devices. The Proline flow measuring devices are accessed via a service
interface or via the service interface FXA 193 or the HART protocol.
Contents of the “ToF Tool - Fieldtool Package”:
• Commissioning, maintenance analysis
• Configuring flowmeters
• Service functions
• Visualisation of process data
• Trouble-shooting
• Access to the verification data and update to software of the "Fieldcheck" flow simulator.
Further operating programs
• “AMS” operating program (Fisher Rosemount)
• “SIMATIC PDM” operating program (Siemens)