Compatibility; Adaptive Cycles - Siemens SINUMERIK 840D Function Manual

M3: Coupled axes
14.5 Generic coupling
Multiple coupling cascades in series is also possible. The internal computation sequence of the
individual coupling modules is performed so that there is no position offset in the coupling
relationship. This also applies for a cross-channel cascading.
Example:
Two new coupling modules are created. For the coupling module with following axis X2, the
leading axis X1 is defined. For the coupling module with following axis X2, the leading axis X2
and A1 are defined.
Programming
CPDEF=(X2) CPLA[X2]=(X1) CPDEF=(A2) CPLA[A2]=(X2) CPLA[A2]=(A1)
Supplementary conditions
● The availability of cascading is option-based (see Section "Requirements").
● Cascades between couplings of existing coupling functions and couplings of generic
couplings are not possible.
● A ring coupling is not permitted. It is rejected with alarm 16778:
"Ring coupling with following axis FAx and leading axis LAx not allowed"
(A ring coupling occurs when a following axis is also a leading axis of its own coupling
module or a leading axis in a series-connected coupling module).
14.5.7

Compatibility

14.5.7.1

Adaptive cycles

Adaptive cycles
The provision of adaptive cycles as fixed component of the NC software ensures a syntactic
and functional compatibility to coupling calls of existing coupling types (coupled motion, master
value coupling, electronic gearbox and synchronous spindle). This means that as long as the
manufacturer/user does not need new coupling characteristics, it is not necessary to modify
present coupling calls and any dependent application components (e.g. PLC evaluation of
coupling signals).
Assignment to existing coupling commands
The number of adaptive cycles corresponds to the number of existing coupling commands. The
assignment is as follows:
Coupling commands
TRAILON
TRAILOF
LEADON
542
Adaptive cycle
cycle700
cycle701
cycle702
Function Manual, 06/2019, A5E47437747B AA
Axes and spindles