Drive-Independent Reactions - Siemens sinumerik 840d Programming Manual

Additional Functions
13
13.5 Extended stopping and retract (as of SW 5)
840D 840D
NCU 571 NCU 572
NCU 573
As an independent drive mode, it provides the
drive DC link with the necessary power to
perform an orderly "stop" and "retract" in the
event of a power failure or similar occurrence.
All reactions can be used independently from one
another.
For further information, see
/FB/ M 3, Axis Couplings and ESR

13.5.1 Drive-independent reactions

Function
Drive-independent reactions are defined axially; if
activated, each drive processes its stop/retract
request independently. There is no interpolatory
coupling of axes or coupling adhering to the path at
stop/retract, the reference to the axes is time-
controlled.
During and after execution of drive-independent
reactions, the respective drive no longer follows the
NC enables or NC travel commands. Power
OFF/Power ON is necessary. Alarm "26110: Drive-
independent stop/retract triggered" draws attention
to this.
Generator operation
Generator operation is
• Configured: via MD
• Enabled: system variable $AA_ESR_ENABLE
• Activated: depending on the setting of the drive
machine data when the voltage in the DC link
falls below the value.
Stop (independent drive)
Drive-independent stop is
• Configured: via MD as well as time specification
via MD;
• Enabled ($AA_ESR_ENABLE) and
• Triggered: system variable $AN_ESR_TRIGGER.
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FM-NC 810D 840Di
SINUMERIK 840D/840Di/810D/FM-NC Programming Guide Advanced (PGA) – 04.00 Edition
12.98
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