Siemens sinumerik 840D sl Function Manual page 325

Example:
CPFMSON[X2]="CFAST"
Special functions: Axis Couplings and ESR (M3)
Function Manual, 11/2006, 6FC5397-2BP10-2BA0
"ACN" Absolute Co-ordinate
Negative
"ACP" Absolute Coordinate
Positive
"DCT" Direct Co-ordinate
Time Optimized
"DCP" Direct Co-ordinate
Path Optimized
Default value: "CFAST"
; CFAST is taken as synchronization mode of the coupling to
following axis X2.
Detailed description
2.5 Generic coupling
For rotary axes only!
The rotary axis traverses
towards the synchronized
position in the negative axis
direction. Synchronization is
effected immediately.
For rotary axes only!
The rotary axis traverses to
the synchronized position in
the positive axis direction.
Synchronization is effected
immediately.
For rotary axes only!
The rotary axis traverses to
the programmed synchronized
position in time-optimized
fashion. Synchronization is
effected immediately.
For rotary axes only!
The rotary axis traverses to
the programmed synchronized
position in path-optimized
fashion. Synchronization is
effected immediately.
105