Curve Tables; Product Brief; Function; Preconditions - Siemens SINUMERIK 840D sl Function Manual

M3: Coupled axes

5.2 Curve tables

5.2 Curve tables
5.2.1

Product brief

5.2.1.1

Function

The "curve tables" function can be used to define the complex sequence of motions of an axis
in a curve table.
Any axis can be defined as a leading axis and a following axis can be traversed by taking a
curve table into account.
The command variable in these motion sequences is an abstract master value, which is
generated by the control or derived from an external variable (e.g. simulated position of an
axis).
Creating curve tables is performed via part program sequences.
The curve tables in the static NC memory remain valid after the part program has been been
closed or after POWER DOWN.
Curve tables can be saved in dynamic NC memory for faster access. Please note that tables
need to be reloaded after run-up.
Axis groupings with curve tables must be reactivated independently of the storage location of
the curve table after POWER ON.
Linear curve table segments are stored in separate areas to save memory space.
5.2.1.2

Preconditions

Memory configuration
Static NC memory
Memory space for curve tables in static NC memory is defined by machine data:
MD18400 $MN_MM_NUM_CURVE_TABS (number of curve tables)
MD18402 $MN_MM_NUM_CURVE_SEGMENTS (number of curve segments)
MD18403 $MN_MM_NUM_CURVE_SEG_LIN (number of linear curve segments)
MD18404 $MN_MM_NUM_CURVE_POLYNOMS (number of curve table polynomials)
Dynamic NC memory
Memory space for curve tables in dynamic NC memory is defined by machine data:
MD18406 $MN_MM_NUM_CURVE_TABS_DRAM (number of curve tables)
MD18408 $MN_MM_NUM_CURVE_SEGMENTS_DRAM (number of curve segments)
MD18409 $MN_MM_NUM_CURVE_SEG_LIN_DRAM (number of linear curve segments)
MD18410 $MN_MM_NUM_CURVE_POLYNOMS_DRAM (number of curve table
polynomials)
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Function Manual, 09/2011, 6FC5397-2BP40-2BA0
Special Functions