Extended Stop And Retract - Siemens SINUMERIK 840D sl Programming Manual

Additional functions

13.7 Extended stop and retract

13.7 Extended stop and retract
13.7
Function
The "Extended stop and retract" function ESR provides a means to react flexibly to selective
error sources while preventing damage to the workpiece.
Available part reactions
"Extended stop and retract" provides the following part reactions:
• "Extended stop" (drive-independent) is a defined, time-delayed stop.
• "Retract" (drive-independent)
• "Generator operation"(drive-independent)
Additional extensions
• Extended stop (NC–controlled)
• Retract" (NC-controlled)
All reactions can be used independently from one another. For further information refer to
/FB3/ Function Manual, Special Functions; Coupled axis and ESR (M3).
Possible initiation sources
The following error sources are possible for starting "Extended stop and retract":
General sources (NC-external/global or mode group/channel-specific):
• Digital inputs (e.g. on NCU module or terminal box) or the readback digital output image
• Channel status $AC_STAT
• VDI signals ($A_DBB)
• Group messages of a number of alarms ($AC_ALARM_STAT)
13-30
means "escaping" from the machining plane to a safe retracted position. This means any
risk of collision between the tool and the workpiece is avoided.
Generator operation is possible in the event that the DC link power is insufficient for safe
retraction. As a separate drive operating mode, it provides the necessary power to the
drive DC link for carrying out an orderly "Stop" and "Retract" in the event of a power
outage or similar failure.
is a defined, time-delayed, contour-friendly shut down controlled by the NC.
means "escaping" from the machining plane to a safe retracted position under the control
of the NC. This means any risk of collision between the tool and the workpiece is
avoided. With gear cutting, for example, retract will cause a retraction from tooth gaps
that are currently being machined.
within the control ($A_IN, $A_OUT)
Programming Manual, 03/2006 Edition, 6FC5398-2BP10-1BA0
Job planning