Rockwell Automation 1797-OE8H FLEX Ex HART Analog Modules User Manual - Manual (Page 126)

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.