KROHNE MFC 400 EN - Manual (Page 139)

DESCRIPTION OF HART INTERFACE
9
139
MFC 400
www.krohne.com 08/2013 - 4002075802 - MA MFC 400 R02 en
9.4 Inputs/outputs and HART ® dynamic variables and device variables
The signal converter is available with various input/output combinations.
The connection of the terminals A…D to the HART ® dynamic variables PV, SV, TV and 4V depends
on the device version.
PV = Primary Variable; SV = Secondary Variable; TV = Tertiary Variable; 4V = Fourth Variable
The signal converter can provide up to 14 measurement-related values. The measured values
are accessible as so-called HART
® device variables and can be connected to the HART ® dynamic
variables. The availability of these variables depends on the device versions and the settings.
Code = device variable code
Device variables
Signal converter version HART ® dynamic variable
PV SV TV 4V
Basic I/O, connection terminals A D - -
Modular I/O and Ex i I/O, connection terminals C D A B
HART ® device variable Code Type Explanations
Flow Velocity 0 linear
Volume Flow 1 linear
Mass Flow 2 linear
Temperature 3 linear
Density 4 linear
Sensor Average 5 linear Diagnostic value, optional, available
when one of the diagnostic channels (1,
2, 3) is set to "Sensor Average".
Sensor Deviation 6 linear Diagnostic value, optional, available
when one of the diagnostic channels (1,
2, 3) is set to "Sensor Deviation".
Drive Level 7 linear Diagnostic value, optional, available
when one of the diagnostic channels (1,
2, 3) is set to "Drive Level".
Tube Frequency 8 linear Diagnostic value, optional, available
when one of the diagnostic channels (1,
2, 3) is set to "Tube Frequency".
9 linear
10 linear
2 Phase Signal 11 linear Diagnostic value, optional, available
when one of the diagnostic channels (1,
2, 3) is set to "2 Phase Signal".
Concentration 1 12 linear Available when concentration
measurement is switched on.
Concentration 2 13 linear Available when concentration
measurement is switched on and
Concentration 2 is not switched off.
.book Page 139 Monday, August 26, 2013 9:05 AM