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X41/34
X42/4
1
6 – 176
Flowchart for:
n
TNC 430 CA/PA
n
TNC 426 M/30 000 rpm (NC software < 280 476-06)
n
TNC 430 M (NC software < 280 476-06)
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3
4 5 6
7
8 9 10 11 12 13
Step
Function
1
Waiting for machine control
voltage
2
Recognition of the machine
control voltage on X42/4 and
switch-off of the control-is-ready
signal on X41/34 by host
computer (t < 66 ms)
3
Maximum time within which the
control-is-ready acknowledgment on
X42/4 must go to zero (t < 380 ms)
4
Recognition of the
acknowledgment and setting of
X41/34 (t < 20 ms)
5
Waiting for machine control
voltage
6
Recognition of the machine
control voltage on X42/4 and
switch-off of the control-is-ready
signal on X41/34 by DSP 1
(t < 120 ms)
7
Maximum time within which the
control-is-ready acknowledgment
on X42/4 must go to zero (t < 380
ms)
8
Recognition of the
acknowledgment and setting of
X41/34 (t < 120 ms)
9
Waiting for machine control
voltage
10
Recognition of the machine
control voltage on X42/4 and
switch-off of the control-is-ready
signal on X41/34 by DSP 2
(t < 120 ms)
14
15
Screen display
RELAY EXTERNAL DC VOLTAGE
MISSING
If exceeded
EMERGENCY STOP DEFECTIVE
RELAY EXTERNAL DC VOLTAGE
MISSING
If exceeded
EMERGENCY STOP DEFECTIVE
RELAY EXTERNAL DC VOLTAGE
MISSING
HEIDENHAIN Technical Manual TNC 426, TNC 430
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17
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