Literature; Glossary - Pepperl+Fuchs KFD2-HMM-16 Manual

6.3

Literature

/1/ HART Communication Foundation:
HART - SMART Communications Protocol Specification
HCF SPEC-11, Revision 5.9
www.hartcomm.org
/2/ HART Communication Foundation:
HART Application Guide
HCF LIT 34
www.hartcomm.org
/3/ Romilly Bowden, Fisher-Rosemount:
HART- A technical Overview, August 1997
Fisher-Rosemount
6.4

Glossary

Address
In communications technology, the address of a device is used to identify that device, so that mes-
sages can be delivered correctly. HART uses two forms of addressing: a polling address in the
range 0 to 15, and a unique identifier (long frame format address) of 38 bits. The polling address 0
is reserved for 4m A. . .2 0mA analogue transmitters in
ses 1 ... 15 for transmitters in
Broadcast Mode
➝ Burst Mode
Burst Mode
A communication mode in which a master device instructs slave devices to continiously broadcast
process values (e. g. the
recognizes and supports this mode, but itself does not instruct field devices to use this mode.
FSK
Abbrev. for Frequency Shift Keying. Method of coding the two digital signals "0" and "1" with two dif-
ferent frequencies.
HART
Abbrev. for Highway Addressable Remote Transducer. Used to describe communications that com-
plies to the HART specification. HART is a
Host
Higher layer system, e. g. service station, PC oder process control system.
Long frame address
➝ Address
Master
A device (e. g. the process control system) in a
tions and commands.
Master-slave system
A communication system in which all message transactions and commands are always initiated by
➝ master device and ➝ slave devices only respond to requests received.
a
Subject to reasonable modifications due to technical advances.
32
Pepperl+Fuchs Group • Tel.: Germany (06 21) 7 76-0 • USA (330) 4 25 35 55 • Singapore 7 79 90 91 • Internet http://www.pepperl-fuchs.com
HART Multiplexer Master KFD2-HMM-16
➝ multidrop networks.
➝ primary variable) until the master instructs it to stop. The multiplexer
➝ master-slave system.
➝ master-slave system that initiates all transac-
➝ point-to-point networks, polling addres-
Copyright Pepperl+Fuchs, Printed in Germany
Appendix