Samson 3730 Series - HART Communication; Dynamic HART Variables

6-4 EB 8384-3 EN
Operation
6.2 HART
®
communication
The positioner must be supplied with at least
3.6mA.TheFSKmodemmustbeconnected
in parallel to the current loop.
ADTMle(DeviceTypeManager)conform-
ingtotheSpecication1.2isavailablefor
communication. This allows the device, for
example to be run with the PACTware user
interface. All the positioner's parameters are
accessible over the DTM and the user inter-
face.
For start-up and settings, proceed as de-
scribedinthe'Start-upandconguration'
section.RefertothecodelistinAnnexAfor
the parameters necessary for the user inter-
face.
If complex functions are started in the posi-
tioner, which require a long calculation time
or lead to a large quantity of data being
saved in the volatile memory of the position-
er, the alert 'busy' is issued by the DTM le.
This alert is not an error message and can
be simply conrmed.
Locking HART
®
communication
The write access for HART
®
communication
canbedisabledoverCode47.Thisfunction
can only be enabled or disabled locally at
the positioner.
Writeaccessisenabledbydefault.
Locking on-site operation
The on-site operation including the INIT key
can be locked over HART
®
communication.
The word 'HART' then blinks on the display
whenCode3isselected.Thislockingfunc-
tion can only be disabled over HART
®
com-
munication. On-site operation is enabled by
default.
6.2.1 Dynamic HART
®
vari-
ables
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.
IntheType3730-3Positioner,thedynamic
variables can be assigned by the DD or in
TROVIS-VIEW[Settings>Operationunit]as
shown in Table 6-1.
Note