Siemens SINUMERIK 802D sl Function Manual page 419

Channel-specific feedrate and rapid traverse override
One enable signal and one byte are provided on the PLC interface for the override factor in
percent for feedrate and rapid traverse:
● IS "Feedrate override" (VB3200 0004)
● IS "Feedrate override active" (V3200 0006.7)
● IS "Rapid traverse override" (VB3200 0005)
● IS "Rapid traverse override active" (V3200 0006.6)
The interface for the override (value) is supplied by a machine control panel via the PLC to
the NC and it is Gray-coded.
An active feedrate override acts on all path axes. An active rapid traverse override acts on all
axes traversing with rapid traverse.
If there is no dedicated rapid traverse override switch, the feedrate override switch can be
used. In this case, feedrate overrides above 100% are limited to 100% for rapid traverse
override.
The override to be active can be selected via the PLC or operator panel.
If the selection is made using the operator panel (display: ROV), the IS "Feedrate override
for rapid traverse selected" (V1700 0001.3) is set and must be transferred by the PLC user
program to the IS "Rapid traverse override active" (V3200 0006.6). The value itself is to be
transferred by the PLC user program from a machine control panel to the IS "Rapid traverse
override" (VB3200 0005).
The channel-specific feedrate and rapid traverse overrides are inactive if G33, G63, G331
and G332 are active.
Axis-specific feedrate override
One enable signal and one byte for the feedrate override factor in percent are available on
the PLC interface for each axis:
● IS "Feedrate override" (VB380x 0000)
● IS "Override active" (V380x 0001.7)
If G33, G331, G331, G63 are active, the axis-specific feedrate override has no effect (is
internally set to a fixed value of 100%).
Spindle override
One enable signal and one byte for the spindle override factor in percent are available on the
PLC interface for each spindle:
● IS "Spindle override" (VB380x 2003)
● IS "Override active" (V380x 0001.7)
The additional signal IS "Feedrate override for spindle valid" (V380x 2001.0) allows the PLC
user program to determine that the value of the IS "Feedrate override" (VB380x 0000)
should apply.
Turning, Milling, Nibbling
Function Manual, 11/2012, 6FC5397-1CP10-5BA0
Feed (V1)
24.3 Feedrate control
419