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6.7 HART
®
for IFC 090
HART
®
interface
The HART interface is a smart interface, in other words a communication signal superimposed on
the current output. All functions and parameters can be accessed via this interface.
The following HART features are supported by the IFC 090 signal converter:
• point-to-point connection
• multidrop (up to 15 HART devices)
The burst mode is not normally used and is therefore not supported. Further information about
HART is available from the HART Communication Foundation, of which Krohne is a member.
Electrical connection
Factory setting for the point-to-point mode with HART
• In Menu 1.05, the “FUNCT.I” parameter must be set to “1 DIR”. or “2 DIR.”.
• IMPORTANT: In Menu 1.05, the “RANGE I” parameter must be set to “4-20 mA”, or, in the case
of variable setting, the value for “
I
0%
” must be at least 4 mA.
• In Menu 3.09, the “COM1” parameter must be set to “HART” and the “ADDRESS” parameter
to “0”.
• The current output may be operated in the active or passive mode.
Factory setting for the multidrop mode with HART
• In Menu 1.05, the “FUNCT.I” parameter must be set to “OFF”.
• In Menu 3.09, the “COM1“ parameter must be set to “HART” and the “ADDRESS” parameter to
a value of “1-15”. This address may only be set for one device in the HART multidrop network.
• IMPORTANT: the current output may only be operated in the passive mode.
to HART communicator
or smart converter
to HART communicator
or smart converter
to next
HART device
power supply unit
HART connection active
HART connection passive
4 mA
U
H
