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

Additional functions

16.11 Extended stop and retract (ESR)

16.11 Extended stop and retract (ESR)
Function
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
● Retraction
● Generator operation (SINAMICS drive function "Vdc control")
Trigger sources
General sources (NC-external/global or mode group-/channel-specific):
● Digital inputs (e.g. on NCU module or the controller-internal digital output image that can
● Channel state ($AC_STAT)
● VDI signals ($A_DBB)
● Group messages of a number of alarms ($AC_ALARM_STAT)
Axial sources
● Emergency retraction threshold of the following axis (synchronism of electronic coupling,
● Drive: DC link warning threshold (imminent undervoltage), $AA_ESR_STAT[<axis>]
● Drive: Generator minimum speed threshold (no further regenerative rotation energy
Gating logic of the static synchronized actions: Source/response link
The static synchronized actions' flexible gating possibilities are used to trigger specific
reactions relatively quickly according to the sources.
Linking all relevant sources using static synchronized actions is the responsibility of the user.
They can selectively evaluate the source system variables as a whole or by means of bit
masks, and then make a logic operation with their desired reactions. The static synchronous
actions are effective in all operating modes.
References:
Function Manual, Synchronized Actions
616
Assuming that the specific fault situation permits it, all of the axes, enabled for extended
stopping, are stopped in an orderly fashion.
The tool currently in use is retracted from the workpiece as quickly as possible.
If a parameterizable value of the DC link voltage is fallen below, e.g. because the line
voltage fails, the electrical energy required for retraction is generated by recovering the
braking energy of the drive intended for this purpose (generator operation).
be read back ($A_IN, $A_OUT)
$VA_EG_SYNCDIFF[<following axis>])
available), $AA_ESR_STAT[<axis>].
Programming Manual, 03/2013, 6FC5398-2BP40-3BA1
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