Signal Monitoring - Siemens SINUMERIK 840D sl Function Manual

N4: Punching and nibbling - only 840D sl
10.2 Stroke control
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.
724
Function Manual, 09/2009, 6FC5397-1BP20-0BA0
Extended Functions