Siemens sinumerik 840d Programming Manual page 444

Additional Functions
13
13.4 EG: Electronic gear (SW 5 and higher)
840D 840D
NCU 571 NCU 572
NCU 573
Explanation
FA
Block change mode
[, LAi, SynPosLAi, Zi, Ni]
LA1, ... LA5
SynPosLAi
Z1, ... Z5
N1, ... N5
It is only permissible to program leading axes that
have previously been specified with EGDEF.
Via the programmed "synchronized positions" for the
following axis (SynPosFA) and for the leading axes
(SynPosLA), positions are defined in which the
coupling group is valid as synchronized. If the
electronic gear is not in synchronized state when it is
activated, the following axis will traverse to its
defined synchronized position.
If modulo axes are contained in the coupling group,
their position values are modulus-reduced. This
ensures that the next possible synchronized position
is approached (so-called relative synchronization:
e.g. the next tooth gap). The synchronized position is
only approached if "Enable following axis override"
interface signal DB(30 + axis number), DBB26 bit 4
is issued for the following axis. If it is not issued, the
program stops at the EGONSYN block and self-
clearing alarm 16771 is output until the above
mentioned signal is set.
13-444
FM-NC 810D 840Di
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
Counter for coupling factor i
Denominator for coupling factor i
Coupling factor i = Counter i / Denominator i
SINUMERIK 840D/840Di/810D/FM-NC Programming Guide Advanced (PGA) – 04.00 Edition
12.98
13
Immediate block change
Block change occurs at
"Synchronization fine"
Block change occurs at
"Synchronization coarse"
Block change occurs at
setpoint
synchronization run
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