Siemens SINUMERIK 828D Programming Manual page 392

Coordinate transformations (frames)
12.10 Deselecting overlaid movements (DRFOF, CORROF)
Further information
$AA_OFF_VAL
Once the position offset has been deselected by means of $AA_OFF, system variable
$AA_OFF_VAL (integrated distance of axis override) for the corresponding axis will equal
zero.
$AA_OFF in JOG mode
In JOG mode too, if $AA_OFF changes, the position offset will be interpolated as an overlaid
movement if this function has been enabled via machine data MD 36750
$MA_AA_OFF_MODE.
$AA_OFF in synchronized action
If a synchronized action which immediately resets $AA_OFF (
active when the position offset is deselected using the
program command, then $AA_OFF will be deselected and not reset, and alarm 21660 will be
signaled. However, if the synchronized action becomes active later, e.g. in the block after
CORROF
Automatic channel axis exchange
If an axis for which
pulled into the channel when the axis changes (condition:
MD30552 $MA_AUTO_GET_TYPE > 0) and then the position offset and/or the DRF offset
will be deselected.
392
, $AA_OFF will remain set and a position offset will be interpolated.
has been programmed is active in another channel, it will be
CORROF
DO $AA_OFF[<axis>]=<value>
CORROF(<axis>,"AA_OFF")
Programming Manual, 07/2010, 6FC5398-1BP40-0BA0
) is
part
Fundamentals