Siemens sinumerik 840D sl Function Manual page 228

Brief description
1.2 Curve tables
1.1.2 Preconditions
Coupled motion function
The coupled motion function forms part of the NCK software.
Generic coupling
The coupled motion functionality is also available in the generic coupling.
However, for basic operation of generic coupling, the following limitations apply:
• The maximum number of coupled motion groupings is limited to 4.
• Only 1 leading axes may be assigned to each coupled motion axis.
• Cascading is not possible.
Note
These limitations do not apply when NCK software is supplied with the relevant options of
generic coupling (refer to "Preconditions" in the "Brief Description" of Generic Coupling).
1.2 Curve tables
1.2.1 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.
8
Special functions: Axis Couplings and ESR (M3)
Function Manual, 11/2006, 6FC5397-2BP10-2BA0