HEIDENHAIN TNC 306 Technical Manual - Manual (Page 5)

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TNC 416/TNC 406/TNC 306 Hardware concept 3/2000
1 Hardware concept
The HEIDENHAIN TNC 416/TNC 406/TNC 306 controls are designed for ram-type electrical
discharge machines.
The TNCs consists of several different assemblies. The main component is the logic unit.
The logic unit is connected to the other assemblies and to peripheral equipment by means of
connecting cables.
Encoders
Nominal value
outputs
PLC I/0 unit
Visual display unit
TNC keyboard unit
Short circuit/
touch probe
Electronic handwheel
Data interfaces
NC PLC
Common
data area
Machine operating panel
PLC outputs
PLC inputs
Analogue input
for gap control
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The logic unit contains the circuitry for both the NC and the PLC sections of the control. The
common data area contains the machine parameters, PLC markers and words. The machine
parameters define the machine hardware configuration (traverse ranges, acceleration, number of
axes, etc.). The PLC markers and words are used for the exchange of information between the NC
and the PLC.