Siemens Sinumerik 840D sl Programming Manual page 545

Multi-edge machining can even be supported by means of the specification of a
transformation ratio not equal to 1 between the leading and following spindles.
Syntax
COUPDEF(<FS>,<LS>,<TFS>,<TLS>,<block change>,<coupling type>)
COUPON(<FS>,<LS>,<POSFS>)
COUPONC(<FS>,<LS>)
COUPOF(<FS>,<LS>,<POSFS>,<POSLS>)
COUPOFS(<FS>,<LS>)
COUPOFS(<FS>,<LS>,<POSFS>)
COUPRES(<FS>,<LS>)
COUPDEL(<FS>,<LS>)
WAITC(<FS>,<block change>,<LS>,<block change>)
Note
Abbreviated notation
The COUPOF, COUPOFS, COUPRES, and COUPDEL statements support abbreviated notation
without specification of the leading spindle.
Meaning
COUPDEF:
COUPON:
COUPONC:
COUPOF:
Job planning
Programming Manual, 02/2011, 6FC5398-2BP40-1BA0
Define/change coupling on user-specific basis
Activate coupling. The following spindle synchronizes to the leading
spindle based on the actual speed
Coupling when activating with previous programming of M3 S... or
M4 S....
A difference in speed for the following spindle is transferred
immediately.
Deactivate coupling.
• With immediate block change:
COUPOF(<S2>,<S1>)
• Block change only after <POSFS> or <POSLS> deactivation
position(s) has (have) been crossed:
COUPOF(<S2>,<S1>,<POSFS>)
COUPOF(<S2>,<S1>,<POSFS>,<POSLS>)
Axis couplings
9.5 Synchronous spindle
545