KROHNE OPTISONIC 7300 EN - Manual (Page 113)

DESCRIPTION OF HART INTERFACE
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OPTISONIC 7300
www.krohne.com 09/2012 - 4001102303 - MA OPTISONIC 7300 R03 en
9.4 Inputs/outputs and HART ® dynamic variables and device variables
The signal converter is available with various in-/output combinations.
The connection of the terminals A…D to the HART ® dynamic variables PV, SV, TV and QV
depends on the device version.
PV = Primary Variable; SV = Secondary Variable; TV = Third Variable; QV = Quarternary Variable
The signal converter can provide up to 14 measurement-related values. These 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
For the dynamic variables connected to the linear analogue outputs (for current and/or
frequency) are assigned by selecting the measurement for the related outputs. Only linear
device variables can be assigned in this case.
For dynamic variables not connected to linear analogue outputs both linear and totaliser device
variables can be assigned.
Signal converter version
HART ® dynamic variable
PV SV TV QV
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
volume flow 20 linear
corrected volume flow 21 linear
mass flow 22 linear
molar mass 23 linear
flow speed 25 linear
velocity of sound 26 linear
signal gain 27 linear
diagnosis 1 28 linear Function and availability depends on diagnosis 1 value
setting.
diagnosis 2 29 linear Function and availability depends on diagnosis 2 value
setting.
diagnosis 3 30 linear Function and availability depends on diagnosis 3 value
setting.
counter 1 (C) 6 totaliser Valid for Basic I/O option only.
counter 1 (B) 13 totaliser Valid for Modular I/O and Ex i I/O options only.
counter 2 (D) 14 totaliser -
counter 3 (A) 12 totaliser Valid for Modular I/O and Ex i I/O options only.