Rockwell-automation 1797-OE8H FLEX Ex HART Analog Modules User Manual Manual de usuario Pagina 126

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Publication 1797-6.5.3 - March 2006
B-2 FLEX Ex HART Module Commands
Universal Commands
Table B.1 Universal HART Module Commands
Command Action Meaning
0 Read Read unique device
identification
12-byte device identifiers are
given in the response.
1 Read HART variables (process
values)
Commands are only supported for
compatibility purposes and are
without any meaning.
The transmitters, that is, the
SCAN function, have the following
functions.
Read primary variable
Read primary variable as
current (in mA) and percent
range)
Primary variable is read as
a current (in mA) and four
predefined dynamic
variables
2—
3
11 Read unique identifier
associated with tag
The response is a 12-byte device
identifier if the given tag matches
the tag of the multiplexer.
12 Read message Read the 32-bit message
(also see 17).
13 Selection switch markings in
hand, read description, and date
Read the 8-digit selection switch
marking (tag) and the 16-digit time
and date.
17 Write Write message The 32-digit message is written
(also see 12).
18 Write tag, description, and date Save an 8-digit (tag), a 16-digit
description, and date.
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