Siemens SINUMERIK 840D sl Function Manual page 699

Programming
● Syntax
$AA_ETRANS[<axis>] = <value>
● Meaning
NC/PLC interface signal
DB31, ... DBX3.0 = 0 → 1 ⇒ $P_EXTFRAME[<axis>] = $P_EXTFR[<axis>] =
$AA_ETRANS[<axis>]
DRF offset
The DRF offset enables the adjustment of an additive incremental work offset for geometry
and additional axes in the basic coordinate system through handwheel.
The DRF offset can be read via the axis-specific system variable:
$AC_DRF[<Axis>]
References:
Function Manual, Extended Functions; Manual and Handwheel Travel (H1),
Section: DRF offset
Overlaid movements
The "Overlaid movement" for the programmed axis can only be accessed from synchronized
actions via the system variable $AA_OFF[axis].
RESET response
Channel reset / end of program reset
The activated values remain active after RESET and program end.
Reset response of channel-specific system fames as follows:
The system frame for the "external work offset" is active after RESET with the following
machine data setting:
MD24006 $MC_CHSFRAME_RESET_MASK, bit 1 = 1
The "external work offset" in the active system frame is deleted in the data management
through the following machine data setting:
MD24006 $MC_CHSFRAME_RESET_MASK, bit 1 = 0
The following frames are active after RESET:
● System frame for:
MD24006 $MC_CHSFRAME_RESET_MASK, Bit 4 = 1 (workpiece reference point)
MD24006 $MC_CHSFRAME_RESET_MASK, Bit 5 = 1 (cycles)
Basic Functions
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
$AA_ETRANS:
<axis>:
<value>:
K2: Axis Types, Coordinate Systems, Frames
System variable to buffer the external work offset
Channel axis
Offset value
10.4 Coordinate systems
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