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6.4
HART
®
communication
The positioner must be supplied with at least
3.8 mA current.
A DTM file (Device Type Manager) conform-
ing to the Specification 1.2 is available for
communication. This allows the device, for
example, to be run with the PACTware oper-
ator interface. All the positioner's parame-
ters are then accessible over the DTM and
the operator interface.
Note:
In the case, complex functions are
started in the positioner, which require a
long calculation time or lead to a large
quantity of data being stored in the volatile
memory of the positioner, the alert “busy” is
issued by the DTM file.
This alert is not a fault alarm
and can sim-
ply be confirmed.
Write protection
4
The write protection for HART communi-
cation can be disabled over Code
47
.
You can only disable or enable this func-
tion locally at the positioner.
The write protection is enabled by de-
fault.
4
The on-site operation can be locked over
HART communication.
HART
then blinks
on the display when Code
3
is selected.
This locking function can only be dis-
abled over HART communication.
On-site operation is enabled by default.
6.4.1 Dynamic HART
®
variables
The HART
®
specification defines four dy-
namic variables consisting of a value and an
engineering unit. These variables can be as-
signed to device parameters as required.
The universal HART
®
command 3 (universal
command #3) reads the dynamic variables
out of the device. This allows manufac-
turer-specific parameters to also be trans-
ferred using a universal command.
The dynamic variables of TROVIS SAFE
3731-3 can be assigned as follows in the
DD or TROVIS-VIEW [Settings > Operation
unit]:
46
EB 8387-3S EN
Operator controls and readings
Содержание TROVIS SAFE 3731-3
Страница 5: ...EB 8387 3S EN 5...
Страница 92: ...92 EB 8387 3S EN...
Страница 93: ...EB 8387 3S EN 93...
Страница 94: ...94 EB 8387 3S EN...
Страница 95: ...EB 8387 3S EN 95...
Страница 96: ...96 EB 8387 3S EN...
Страница 97: ...EB 8387 3S EN 97...
Страница 98: ...98 EB 8387 3S EN...
Страница 101: ...EB 8387 3S EN 101...
Страница 102: ...102 EB 8387 3S EN...
Страница 103: ...EB 8387 3S EN 103...