HEIDENHAIN TNC 407 (243 020) Technical Manual - Manual (Page 248)

01.98
TNC 407/TNC 415/TNC 425 5 EMERGENCY STOP-routine 4-123
11. Maximum time during which the acknowledgement of
control readiness on X42/4 must go to 0. (t < 114 ms).
If exceeded EMERGENCY STOP DEFECTIVE
12. Recognize the acknowledgement and set X41/34
(t < 20 ms).
13. Wait for control voltage. RELAY EXT. DC VOLTAGE
MISSING
14. Normal control operation. Output and
control-is-ready acknowledgement signals are high.
15. Control voltage is switched off externally. EMERGENCY STOP
16. After switching on the control voltage again, the
error message can be cancelled, followed by
normal control operation.
17. The control switches off the control-is-ready output Flashing error-
(X41/34) after recognizing a fault. message