
B–63002EN/01
30. DATA INPUT/OUTPUT
NC FUNCTION
331
DNC1 is a poprietary communication network allowing information
exchange between the cell controller and CNC machine tools.
DNC1 is classified into two mode, Mode–1 and Mode–2, by the
connection models.
In the Mode–1, the cell controller plays as a primary station and controls
multiple CNC machine tools in the multi–point–connection.
This mode is usually used to establish small scale FMS.
Primary station
Cell controller
Secondary station
CNC
Command
Response
Secondary station
CNC
Command
Response
In the Mode–2, the cell controller and CNC play as a combined station
in the point–to–point connection.
This mode is usually used for drip feeding of continuous small blocks in
the DNC operation such as mold machining.
Command / Response
CNCCell controller
Combined station Combined station
Response / Command
NOTE
The combined station has combined functions of primary
station and secondary station.
Primary station
This station controls data link and has responsibility of control and
recovery to the other station on the data link. This station corresponds
to the cell controller in the multi–point connection.
Secondary station
This station executes data link control according to the command of
the primary station. This station corresponds to the CNC in the
multi–point connection.
Combined station
This station executes peer–to–peer communication concerning to the
data link control.
30.5
DNC1 CONTROL
Explanations
Mode–1
Mode–2