Siemens SINUMERIK 840D sl Function Manual page 724

K2: Axis Types, Coordinate Systems, Frames
10.5 Frames
The position indicator for axis setpoints is done in WCS or in ENS. The configuring is done via
HMI machine data. Always only one display-coordinate system is active in the channel. For
this reason only one relative frame is provided which generates both relative coordinate
systems in the same ratio. The HMI displays the relative coordinates according to the
configuration.
Figure 10-21 Relative coordinate systems
The data maintenance frame $P_RELFR can be written in the part program and via BTSS. All
the frame components can be modified.
The active system frame $P_RELFRAME can be written in the part program and via BTSS.
The configuring of the system frame $P_RELFR is done via the following machine data:
Machine data
MD28082 $MC_MM_SYSTEM_FRAME_MASK
MD28083 $MC_MM_SYSTEM_DATAFRAME_MASK
MD24006 $MC_CHSFRAME_RESET_MASK.
MD24007 $MC_CHSFRAME_RESET_CLEAR_MASK
MD24008 $MC_CHSFRAME_POWERON_MASK
The axis position in the relative coordinate system WCS
$AA_PCS_REL[ax]. The variable can be read in part program, BTSS and via synchronized
actions.
The axis position in the relative coordinate system ENS
$AA_ACS_REL[ax]. The variable can be read in part program, BTSS and via synchronized
actions.
724
Bit Meaning
11 Creation of $P_RELFR; with this, relative coordi‐
nate systems become existent.
11 Data maintenance frame $P_RELFR
11 $P_RELFR becomes active at Reset
11 $P_RELFR is deleted at Reset
11 $P_RELFR is deleted at PowerOn
can be read via the variable
Rel
can be read via the variable
Rel
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
Basic Functions