Generator Operation/Dc Link Backup; Drive-Independent Stop - Siemens sinumerik 840d Programming Manual

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840D 840D
NCU 571 NCU 572
NCU 573
• Drive-independent stop and/or retract can also be
triggered from the NC side by setting the
corresponding control signal
"$AN_ESR_TRIGGER" (broadcast command to
all drives).
• NC-controlled retract via LIFT_FAST

13.5.5 Generator operation/DC link backup

Function
By configuring drive MD and carrying out the
required programming via static synchronized
actions ($AA_ESR_ENABLE), temporary DC link
voltage drops can be compensated. The time that
can be bridged depends on how much energy the
generator that is used as DC link backup has stored,
as well as how much energy is required to maintain
the active movements (DC link backup and
monitoring for generator speed limit).
When the value falls below the DC link voltage lower
limit, the axis/spindle concerned switches from
position or speed-controlled operation to generator
operation. Drive deceleration (default speed setpoint
= 0) causes regeneration of energy in the DC link.
For more information see
/FB/ M 3, Coupled Motion and Leading Value
Coupling

13.5.6 Drive-independent stop

Function
The drives of a previously coupled grouping can be
stopped by time-controlled cutout delay keeping the
difference between them to a minimum, if the control
is unable to achieve this.
Drive-independent stop is configured and enabled
via MD (delay time T1 in MD) and is enabled by
system variable $AA_ESR_ENABLE and started
with $AN_ESR_TRIGGER.
 Siemens AG 2000. All rights reserved
SINUMERIK 840D/840Di/810D/FM-NC Programming Guide Advanced (PGA) – 04.00 Edition
13.5 Extended stopping and retract (as of SW 5)
FM-NC 810D 840Di
Additional Functions
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