Siemens Sinumerik 840D sl Programming Manual page 539

Version 2:
FA
Block change mode
[,LAi,SynPosLAi,Zi,Ni]
LA1, ... LA5
SynPosLAi
Z1, ... Z5
N1, ... N5
Only leading axes previously specified with the EGDEF command may be programmed in the
activation line. Through the programmed "Synchronized positions" for the following axis
(SynPosFA) and for the leading axes (SynPosLA), positions are defined for which the axis
grouping is interpreted as
when the grouping is switched on, the following axis traverses to its defined synchronized
position.
Version 3:
The parameters correspond to those of version 2 plus:
Approach mode
Variant 3 only affects modulo following axes that are coupled to modulo leading axes. Time
optimization takes account of velocity limits of the following axis.
Job planning
Programming Manual, 02/2011, 6FC5398-2BP40-1BA0
Following axis
The following modes can be used:
"NOC"
"FINE"
"COARSE"
"IPOSTOP"
(do not write the square brackets)
Min. 1, max. 5 sequences of:
Leading axes
Synchronized position for i-th leading axis
Numerator for coupling factor i
Denominator for coupling factor i
Coupling factor i = numerator i/denominator i
synchronous
. If the electronic gear is not in the synchronized state
The following modes can be used:
Approach next tooth gap time-optimized
"NTGT"
Approach next tooth gap path-optimized
"NTGP"
Traverse rotary axis in negative direction absolute
"ACN"
Traverse rotary axis in positive direction absolute
"ACP"
Time-optimized for programmed synchronous position
"DCT"
Distance-optimized to the programmed synchronous
"DCP"
position
9.4 Electronic gear (EG)
Block change takes place immediately
Block change is performed in "Fine
synchronism"
Block change is performed in "Coarse
synchronism"
Block change is performed for setpoint-
based synchronism
Axis couplings
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