Current Block In The Interpolator ($Ac_Blocktype, $Ac_Blocktypeinfo, $Ac_Splitblock) - Siemens SINUMERIK 840D sl Function Manual

The tool length compensation must also be deleted in this case.
If a tool length offset is to remain active extending beyond a reset, and a transformation change
or a change of the tool carrier that can be oriented takes place, then alarm 21665 "Channel
%1 $AA_TOFF[ ] reset" is output. The tool length compensation is set to 0.
After power on, all tool length offsets are set to 0.
The function is deactivated after POWER ON.
Behavior at change of operating mode
The tool length compensation remains active after a change of operating mode. The offset is
executed in all operating modes except JOG and REF.
If a tool length compensation is traversed because of $AA_TOFF[ ] at a change of operating
mode, the operating mode changeover is only carried out after the traversal of the tool length
compensation. Alarm 16907 "Channel %1 action %2 <ALNX> possible only in stop state" is
displayed.
Behavior with REPOS
The tool length compensation is active in REPOS mode.
Supplementary conditions
With an existing tool length offset, the following supplementary conditions must be taken into
account:
● A transformation must be switched off with TRAFOOF.
● Before activating a transformation in the part program, an active tool length offset must be
deleted with TOFFOF.
● A transformation is switched off when changing over from CP to PTP. A tool length offset
must be deleted before the changeover. If a tool length compensation is active when you
change to axis-specific manual travel in JOG mode, the change to PTP is not performed.
CP remains active until the tool length compensation has been deleted via TOFFOF.
● Before a geometry axis interchange, an active tool length offset in the direction of the
geometry axis must be deleted via TOFFOF.
● Before a change of plane, an active tool length offset must be deleted via TOFFOF.
● The TOFFON and TOFFOF are not collected during a block search and not output in the
action block.
3.3.19 Current block in the interpolator ($AC_BLOCKTYPE, $AC_BLOCKTYPEINFO,
$AC_SPLITBLOCK)
Information on the block currently being processed in the main run can be read in synchronized
actions via the following system variables.
Synchronized actions
Function Manual, 08/2018, 6FC5397-5BP40-6BA2
3.3 System variables for synchronized actions
Detailed description
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