Abbreviated address calling

analog input channel amplifier
An amplifier attached to one or more analog input channels, that adapts the analog signal level to the input range of the succeeding analog-to-digital converter.
analog input channel (in process control)
The analog data path between the connector and the analog-to-digital converter in the analog input subsystem.^[c]
analog output channel amplifier
An amplifier attached to one or more analog output channels, that adapts the output signal range of the digital-to-analog converter to the signal level necessary to control the technical process.^[d]
analog representation
A representation of the value of a variable by a physical quantity that is considered to be continuously variable, the magnitude of the physical quantity being made directly proportional to the variable or to a suitable function of the variable.
analogue anplifier
Amplifier the output of which is continuously variable with the applied control signal.
anisochronous transmission
A data transmission process in which there is always an integral number of unit intervals between any two significant instants in the same group; between two significant instants located in different groups, there is not always an integral number of unit intervals.^[e]
answering
The process of responding to a calling station to complete the establishment of a connection between data stations.
anti-vibration mounting
Device for insulating machine vibrations from the structure upon which it is mounted.
argument (in numerical control)
Data which qualifies a command.
arm (primary axes)
An interconnected set of links and powered joints comprising members of longitudinal shape which supports, positions and orientates the wrist and/or an end effector.