Samson 3730-3 - 6 Dynamic HART Variables

90 EB 8389 EN
Dynamic HART® variables
6 Dynamic HART
®
variables
3730-2 3730-3 3731-3 3730-4 3730-5 3731-5
• •
The HART
®
specication denes four dynam-
ic variables consisting of a value and an en-
gineering unit. These variables can be as-
signed to device parameters as required. The
universal HART
®
command 3 reads the dy-
namic variables out of the device. This al-
lows manufacturer-specic parameters to al-
so be transferred using a universal com-
mand.
Depending on the positioner, the dynamic
HART
®
variables can be assigned by the DD
or in TROVIS-VIEW
[Settings > Operation unit] as shown in
Table4:
Settings > Operating unit
− Assignment secondary variable: Variable se-
lected according to Table4 [Valve position]
− Assignment tertiary variable: Variable selected
according to Table4 [Set point deviation e]
− Assignment quaternary variable: Variable se-
lected according to Table4 [Total valve travel]
The resetting of HART
®
variables causes all
variables to be reset at the same time.
Operation > Reset
− Reset 'HART parameter'