Siemens SINUMERIK 840D sl Function Manual page 747

10.2.6 Punching and nibbling-specific reactions to standard PLC signals
DB21, ... DBX12.3 (feed stop)
With interface signal:
DB21, ... DBX12.3 (feed stop),
the NC reacts in the following way with respect to the stroke control:
Signal is detected in advance of instant
t :
1
Signal is detected at instant t
10.2.7 Signal monitoring
Oscillating signal
Owing to aging of the punch hydraulics, overshooting of the punch may cause the "Stroke
active" signal to oscillate at the end of a stroke.
In this case, an alarm (22054 "undefined punching signal") can be generated as a function of
machine data:
MD26020 $MC_NIBBLE_SIGNAL_CHECK.
Reset response
In the case of an NCK reset, the interface signal:
DB21, ... DBX38.0 (stroke initiation active)
is canceled immediately without acknowledgement by the high-speed input.
A currently activated stroke cannot be suppressed.
Extended Functions
Function Manual, 03/2009, 6FC5397-1BP10-4BA0
Stroke initiation is suppressed.
The next stroke is not initiated until the next start or until
the "Feed stop" signal has been canceled.
Machining is then continued as if there had been no
interruption.
: The current stroke is executed to completion.
1
The NC then dwells in the state characterized by t
To allow it to respond in this manner, time monitoring of
the "Stroke active" and "Stroke initiation" signals is
dispensed with.
Punching and Nibbling (N4)
Stroke control
.
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