KROHNE OPTISONIC 3400 EN - Manual (Page 120)

9
DESCRIPTION OF HART INTERFACE
120
OPTISONIC 3400
www.krohne.com 11/2013 - 4002037702 - HB OPTISONIC 3400 -en-R02
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
* Availability depends on diagnosis value setting.
** Availability depends on concentration measurement settings.
For the dynamic variables connected to the linear analogue outputs (for current and/or
frequency) the device variables 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 0 linear
velocity of sound 1 linear
mass flow 2 linear
flow speed 3 linear
signal gain 4 linear
SNR 5 linear
diagnostics velocity of
sound
6 linear *
diagnostics flow speed 7 linear *
diagnostics gain 8 linear *
diagnostics SNR 9 linear *
operating hours 10 linear
volume totaliser 1 11 linear *
mass totaliser 1 12 linear **
volume totaliser 2 13 linear **
mass totaliser 2 14 linear **
volume totaliser 3 15 linear **
mass totaliser 3 16 linear **