HEIDENHAIN TNC 407 (243 020) Technical Manual - Manual (Page 249)

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TNC 407/TNC 415/TNC 425 5 EMERGENCY STOP-routine 01.98
5.2.2 TNC 407
X21/34
X22/4
1 2 3 4 5 6 7 8 9
VDU-display
1. Wait for control voltage. RELAY EXT. DC VOLTAGE
MISSING
2. Recognize the control voltage on X42/4 and reset the
control-is-ready output on X41/34 (t < 70 ms).
3. Maximum time during which the control-is-ready
on X42/4 must go to 0 (t < 146 ms).
If exceeded EMERGENCY STOP DEFECTIVE
4. Recognize the acknowledgement and set
output X41/34 (t < 24 ms)
5. Wait for control voltage. RELAY EXT. DC VOLTAGE
MISSING
6. Normal control operation. Output and
control-is-ready acknowledgement signals are high.
7. Control voltage switched off externally. EMERGENCY STOP
8. After switching on the control voltage again, the
error message can be cancelled, followed by
normal control operation.
9. The control switches off the control-is-ready output Flashing error-
(X41/34) after recognizing a fault. message