ABB RETA-02, Руководство пользователя

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Definitions and abbreviations
108
Name
Symbolic name of a parameter
Nibble
Set of 4 bits
Object Dictionary
Local storage of all Communication Objects recognised
by a device
Object List
List of all accessible objects
Parameter
Value that can be accessed as Object, e.g. variable,
constant, signal
Parameter Number
Parameter address
Parameter/Process
Data Object
Special object that contains Parameter and Process
Data
Process Data
Data that contains Control Word and Reference value
or Status Word and Actual value. May also contain
other (user-definable) control information.
Profile
Adaptation of the protocol for certain application field,
e.g. drives
Request Label
Coded information specifying the required service for
the parameter part sent from master to slave
Response Label
Coded information specifying the required service for
the parameter part sent from slave to master
Slave
Passive bus participant. In PROFINET IO terminology,
slave stations (or slaves) are also called IO-devices.
Also referred to as node.
Status Word
16-bit word from slave to master with bit-coded status
messages
Warning
Signal caused by an existing alarm which does not lead
to tripping of the device