Siemens Sinumerik 840D sl Programming Manual page 550

Axis couplings
9.5 Synchronous spindle
Transformation ratio, TFS / TLS
The transformation ratio is specified as a speed ratio between the following spindle
(numerator) and the leading spindle (denominator). The numerator must be programmed. In
the absence of a programmed value, the denominator is set to = 1.0.
Example:
Following spindle S2 and leading spindle S1, transformation ratio = 1 / 4 = 0.25.
COUPDEF(S2,S1,1.0, 4.0)
Note
The transformation ratio can also be changed on-the-fly (when the coupling is active and the
spindles are rotating).
Block change behavior NOC, FINE, COARSE, IPOSTOP
The following abbreviated notation can be used when programming the block change
behavior:
• "NO": Immediately (default)
• "FI": On reaching "Synchronism fine"
• "CO": On reaching "Synchronism coarse"
• "IP": On reaching IPOSTOP; in other words, after setpoint-based synchronism
Type of coupling DV, AV
The coupling type may be changed only when the coupling is deactivated!
550
CAUTION
Programming Manual, 02/2011, 6FC5398-2BP40-1BA0
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