KROHNE MFC 300 EN - Manual (Page 152)

9
DESCRIPTION OF HART INTERFACE
152
MFC 300
www.krohne.com 02/2012 - 4000498602 - MA MFC 300 R03 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 = Third Variable; 4V = Fourth Variable
The signal converter can provide up to 14 measured 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 20 linear
Volume Flow 21 linear
Mass Flow 22 linear
Temperature 23 linear
Density 24 linear
Concentration 1 25 linear Only when concentration measurement
available and concentration function 1
not switched off.
Concentration 2 / Diagnosis 3 26 linear Concentration 2 Concentration 2 Concentration 2 Concentration 2: only when
concentration measurement available
and concentration function 2 not
switched off.
Diagnosis 3 Diagnosis 3 Diagnosis 3 Diagnosis 3: only available when
diagnosis value 3 not switched off and
concentration function 2 switched off.
Concentration Flow 1 27 linear Only available when concentration
measurement switched on and
concentration function 1 not switched
off.
Concentration Flow 2 28 linear Only available when concentration
measurement switched on and
concentration function 2 not switched
off.
Diagnosis 1 29 linear Available when diagnosis value 1 not
switched off.
.book Page 152 Monday, February 6, 2012 11:01 AM