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Proline Prosonic Flow 91
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Endress+Hauser
5.3
Communication
In addition to 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 → ä 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.
The HART masters, e.g. a handheld terminal or PC-based operating programs (such as FieldCare),
require device description (DD) files which are used to access all the information in a HART device.
Information is exclusively transferred using so-called "commands". There are three different
command groups:
• Universal commands:
All HART devices support and use universal commands.
The following functionalities are linked to them:
– Recognizing HART devices
– Reading digital measured values (volume flow, totalizer, etc.)
• Common practice commands:
Common practice commands offer functions which are supported and can be executed by most
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 empty-pipe/
full-pipe adjustment values, low flow settings etc.
Note!
The measuring device has access to all three command classes. A list of all the "Universal
commands" and "Common Practice Commands" can be found on → ä 33.
5.3.1
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:
Field Xpert HART Communicator
Selecting device functions with a HART Communicator is a process involving a number of menu
levels and a special HART function matrix. The HART manual in the carrying case of the HART
Communicator contains more detailed information on the device.
Operating program "FieldCare"
FieldCare is Endress+Hauser's FDT-based plant asset management tool and allows the configuration
and diagnosis of intelligent field devices. By using status information, you also have a simple but
effective tool for monitoring devices. The Proline flowmeters are accessed via a service interface or
via the service interface FXA291.
Operating program "SIMATIC PDM" (Siemens)
SIMATIC PDM is a standardized, manufacturer-independent tool for the operation, configuration,
maintenance and diagnosis of intelligent field devices.
Operating program "AMS" (Emerson Process Management)
AMS (Asset Management Solutions): program for operating and configuring devices.
Note!
In the CURRENT SPAN function, the HART protocol demands the setting "4 to 20 mA HART" or
"4-20 mA (25 mA) HART".
HART write protection can be disabled or enabled by means of a jumper on the I/O board.
Operation
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