R3: Extended Stop And Retract; Brief Description - Siemens SINUMERIK 840D sl Function Manual

R3: Extended stop and retract

6.1

Brief description

The extended stop and retract function - subsequently called ESR - offers the possibility of
flexibly responding when a fault situation occurs as a function of the process:
• Extended stop
Assuming that the specific fault situation permits it, all of the axes, enabled for extended
stopping, are stopped in an orderly fashion.
• Retract
The tool currently in use is retracted from the workpiece as quickly as possible.
• Generator operation (SINAMICS drive function "Vdc control")
If a parameterizable value of the DC link voltage is fallen below, e.g. because the line
voltage fails, the electrical energy required for retraction is generated by recovering the
braking energy of the drive intended for this purpose (generator operation).
ESR and active couplings
While stopping and retracting, active couplings are kept for a parameterizable time.
Retracting along a path
A straight line can be programmed as retraction path, as an alternative to purely axial
retraction.
Special Functions
Function Manual 09/2011, 6FC5397-2BP40-2BA0
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