
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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