Appendix B - Definitions And Abbreviations; Profibus Definitions - ABB NPBA-12 Installation And Startup Manual

PROFIBUS Definitions

Acyclic Communication
Array
Broadcast
Command Word
Communication Object
Control Word
Cyclic Communication
Device Class
Drivecast
Fault
GSD File
Index
Information Report
Master
Multicast
Name
Nibble
Object Dictionary
Object List
Parameter
NPBA-12 Installation and Start-up Guide
Appendix B – Definitions and Abbreviations
Communication in which messages are sent only once on request
Parameter consisting of data fields of equal data type
Non-acknowledged message from master to all bus participants
(compare Multicast)
See Control Word
Any object of a real device that can be communicated with (variable,
program, data range, etc.). Stored locally in the Object Dictionary
16-bit word from master to slave with bit-coded control signals.
(Sometimes called the Command Word)
Communication in which Parameter-/Process Data-Objects are sent
cyclically at pre-defined intervals
Classification according to the number of profile functions included in
the device
Broad- and Multicast, a special message frame for drives
Event that leads to tripping of the device
ASCII-format device description file in a specified form. Each device
(active & passive stations) on PROFIBUS has to have its own GSD
File. GSD Files for various master stations are available from your local
ABB representative.
Access reference for Objects in PROFIBUS
Non-acknowledged message from master to one or all groups of bus
participants
Control system with bus initiative. In PROFIBUS terminology, master
stations are also called active stations
Non-acknowledged message from master to one group of bus
participants (compare Broadcast)
Symbolic name of a parameter
Set of 4 bits
Local storage of all Communication Objects recognised by a device
List of all accessible objects
Value that can be accessed as Object, e.g. variable, constant, signal
B-1