Signal Monitoring - Siemens SINUMERIK 840D sl Function Manual

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, 01/2008, 6FC5397-1BP10-3BA0
Punching and Nibbling (N4)
10.2 Stroke control
715