Siemens SINUMERIK 840D sl Function Manual page 746

Punching and Nibbling (N4)
Stroke control
10.2.5 PLC signals specific to punching and nibbling
Function
In addition to the signals used for direct stroke control, channel-specific PLC interface
signals are also available. These are used both to control the punching process and to
display operational states.
Signals
Signal
DB21, ... DBX3.0 (no stroke enable)
DB21, ... DBX3.2 (stroke suppression)
DB21, ... DBX3.4 (delayed stroke)
DB21, ... DBX3.1 (manual stroke
suppression)
746
Activation
Prevents the NC from initiating a punching operation.
The NC waits until the enable signal is available
before continuing the part program.
Allows the part program to be processed without
initiating a punching operation (dry run).
With active path segmentation, the axes traverse in
"Stop and go" mode.
Activates delayed stroke output if permitted by
PDELAYON.
Enables the operator to initiate a punching operation
(controlled via the PLC) without executing the part
program.
Manual stroke initiation is acknowledged with signal:
DB21, .. DBX38.1 (acknowledgement of manual
stroke initiation)
Function Manual, 03/2009, 6FC5397-1BP10-4BA0
Extended Functions