December 2001 Monitoring Functions 6 – 177
11 Maximum time within which the
control-is-ready acknowledgment
on X42/4 must go to zero (t < 380
ms)
If exceeded
EMERGENCY STOP DEFECTIVE
12 Recognition of the
acknowledgment and setting of
X41/34 (t < 120 ms)
13 Waiting for machine control
voltage
RELAY EXTERNAL DC VOLTAGE
MISSING
14 Normal control operation.
Control-is-ready output and
acknowledgment are high.
15 Control voltage is switched off
externally.
EMERGENCY STOP
16 After switching on the machine
control voltage again, the error
message can be cleared, and
then the control operates
normally.
17 After detecting a fault, the control
switches off the control-is-ready
output (X41/34).
Blinking error message
Step Function Screen display
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