Siemens sinumerik 840D sl Function Manual page 349

Solution concept
The hazard conditions in the control system are checked cyclically (malfuntion
linked (synchronous actions). Actions are triggered when reasons for initiating a separation
of the tool and the workpiece are detected under the supplementary conditions for temporary
upholding of the axis coupling in the electronic gear. These actions can be one or more of
the ESR reactions described below.
ESR reactions
In SW 5 and lower, "Extended stop and retract" provides the following partial reactions:
• "Extended stop and retract"
• "Retract"
• "Generator operation"
• "Extended stop" (NC-controlled) is a defined, "time delayed" and "contour-friendly" stop.
• "Retract" (NC-controlled) means an "escape" from the machining plane to a safe
All reactions are independent of each other and can be used as gearing in conjunction with
other production. In this way, it is possible to project retractions and temporary continuation
of axis couplings so that they can be executed in parallel, prior to standstill. In this case, a
further axis in generator mode can maintain the DC link voltage.
Special functions: Axis Couplings and ESR (M3)
Function Manual, 11/2006, 6FC5397-2BP10-2BA0
(drive-independent or externally driven) is a defined, delayed stop.
(drive-independent or externally driven) means "escape" from the machining plane to a
safe retraction position. This is to avoid a potential collision between tool and workpiece.
(drive-independent) Generator operation is possible in the event that the intermediate
circuit 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.
retracted position. This is intended to prevent any danger of collision between the tool
and the workpiece. For gear cutting, for example, this means a "retraction from tooth
gaps just machined".
Detailed description
2.7 Extended stop and retract (ESR)
sources
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