Siemens SINUMERIK 840D sl Function Manual page 165

System variable
$P_CUTMOD_ERR
$P_...: Preprocessing variables
$AC_...: Main run variables
All main run variables can be read in synchronized actions. A read access operation from the
preprocessing generates a preprocessing stop.
Plane change
To determine the modified cutting edge position, cutting direction and holder or clearance
angle, the evaluation of the cutting edge in the active plane (G17 - G19) is decisive.
However, if setting data SD42940 $SC_TOOL_LENGTH_CONST (change of the tool length
component when selecting the plane) has a valid non-zero value (plus or minus 17, 18 or 19),
its contents define the plane in which the relevant quantities are evaluated.
This priority rule of the setting data over the G code can be deactivated by setting bit 18 of the
machine data $MC_TOOL_PARAMETER_DEF_MASK. This means that when this bit is set,
the plane defined with the G command of group 6 is still valid.
Tools
Function Manual, 06/2019, A5E47435126B AA
2.9 Modification of the offset data for rotatable tools
Meaning
Error state after the last call of the CUTMOD function
The CUTMOD function can also be called implicitly for a tool change. At a
reset, the variable is reset to zero. It is reset at every tool change and, if
required, rewritten.
The variable is bit-coded. The bits have the following meanings:
Bit 0: No valid cut direction is defined for the active tool.
Bit 1: The cutting edge angle (clearance angle and holder angle) of the
active tool are both zero.
Bit 2: The clearance angle of the active tool has an impermissible value (<
0° or > 180°).
Bit 3: The holder angle of the active tool has an impermissible value (< 0° or
> 90°).
Bit 4: The plate angle of the active tool has an impermissible value (< 0° or
> 90°).
Bit 5: The cutting edge position - holder angle combination of the active tool
is not permitted (the holder angle must be ≤ 90° for cutting edge po‐
sition 1 to 4; for cutting edge positions 5 to 8 it must be ≥ 90°).
Bit 6: Illegal rotation of the active tool.
The tool was rotated out of the active machining plane by ± 90° (with
a tolerance of about 1°). The cutting edge position is therefore no
longer defined in the machining plane.
Bit 7: The cutting plate is not in the machining plane and the angle between
the cutting plate and the machining plane exceeds the upper limit
specified with the setting data SD42998 $SC_CUT‐
MOD_PLANE_TOL.
Bit 8: The cutting plate is not in the machining plane. Angle α is greater than
1°. Angle α is the angle of rotation around the coordinate axis which is
perpendicular to the axis of rotation of angle β as well as to the axis of
rotation of angle γ (the X axis for G18).
W1: Tool offset
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