Rhosonics SDM-4 - HART Communication

SDM – Slurry Density Meter
40 www.rhosonics.com
CONFIGURATION
4.3 HART communication
To set up the HART configuration you need a program called DD edit
With this program you can setup the HART communication.
Even without using HART there is a possibility to use the 4-20 mA Output of the HART. Therefore you only
need to setup the Primary Variable.
This is described in this chapter.
HART has four standard digital outputs namely:
 PV Primary Variable
 SV Secondary Variable
 TV Ternary Variable
 4V Quaternary Variable
NOTE:
The analog signal (4-20 mA Output) is the same as the Primary Variable. This must be set correctly
whether the customer uses HART or not.
4.3.1 Setting the Primary Variable / assigning 4-20mA output
It is possible to assign 4 variables for the HART communication, these are called Dynamic Variables. The
first one is called the Primary Variable (PV) this value is assigned to the 4-20mA analogue. All 4 dynamic
variables (PV, SV, TV and 4V) can be obtained digitally by a DCS which support HART.
There are 8 standard variables you can choose from:
 Device Variable 0: Concentration 1
 Device Variable 1: Concentration 2
 Device Variable 2: Sound Speed
 Device Variable 3: Temperature
 Device Variable 4: SGX1000
 Device Variable 5: Acoustic Impedance
 Device Variable 6: Solids
 Device Variable 7: Power Liquid Echo
NOTE:
It can be that the specific analyzer model doesn’t measure a specific Device Variable. In that case it is not
recommended to select this Device Variable.
Procedure:
 Connect the secondary master to the analyzer
 Make sure the correct DD is in the database:
o \YOUR_PATH\Library\0060C2\E35D
o (Manufacturer ID = 0x60C2)
o (Device ID = 0xE35D)
 Open Analyzer.ddl
 Build DD [Ctrl + M]
 Execute [Ctrl + F5]
 SDC625 is opened