Appendix; Supported Commands - Pepperl+Fuchs KFD2-HMM-16 Manual

6

Appendix

6.1

Supported commands

The following tables show the HART commands supported by the multiplexer, ordered by the three groups
"Universal", "Common-practice" and "Device specific" commands (see also section 2.2). The read com-
mands are caracterised by ! and the write commands by ".
The "Universal" and "Common-practice" commands are described in detail in /1/. In this section only the
functions are explained, not the data structure of the lower layer of the HART protocol.
"Universal" commands:
Command
! Read unique identifier
0
!
1
Read HART variables
!
(process values)
2
!
3
"
6 Write polling address
Read unique identifier associated
!
11
with tag
! Read "Message"
12
! Read tag, description and date
13
"
17 Write "Message"
"
18 Write tag, description and date
Subject to reasonable modifications due to technical advances.
28
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Action
12 bytes device identifier are given in the response.
Commands are only supported for compatibility purpo-
ses and are without any meaning. Used with transmitters
(e.g. SCAN function) they have the following meanings:
1: Read primary variable
2: Read primary variable as current (in mA) and percent
3: Read primary variable as current (in mA) and four
This command is never accepted and the messages
"Access restricted" or "Busy" (see section 5.3.2) will be
returned.
A response will contain 12 bytes device identifier, if the
given tag complies to the tag of the multiplexer.
Read the 32 digit message (see also 17).
Read the 8 digit tag, the 16 digit description and the
date.
Write the 32 digit message (see also 12).
Write the 8 digit tag, the 16 digit description and the
date.
HART Multiplexer Master KFD2-HMM-16
Meaning
of range
(predefined) dynamic variables
Appendix
Copyright Pepperl+Fuchs, Printed in Germany