Siemens SINUMERIK 840D sl Function Manual page 523

Deactivation during motion
Opening the coupling without braking
If the coupling is opened using the programmed commandMASLOF, then for spindles in the
open-loop speed controlled mode, the coupling is immediately opened. The slave spindles
maintain their speeds at the time that the coupling is opened until a new speed is
programmed.
Opening the coupling with braking
If the coupling is opened using the programmed commandMASLOFS, then for spindles in the
open-loop speed controlled mode, the coupling is immediately opened and the slave spindles
braked.
Note
The implicit preprocessor stop is omitted for MASLON and MASLOF. The missing preprocessor
stop means that the $P system variables of the slave spindles do not supply updated values
until reprogrammed.
Coupling characteristics
The behavior regarding the program commands MASLON, MASLOF, MASLOFS, MASLDEL and
the NC/PLC interface signal: DB31, ... DBX24.7 (master/slave close) is, for spindles in the
open-loop speed controlled mode, set using the following machine data:
MD37263 $MA_MS_SPIND_COUPLING_MODE[slave spindle] = <value>
<value>
Special Functions
Function Manual, 09/2011, 6FC5397-2BP40-2BA0
Description
0 Coupling and disconnection take place only at standstill.
The current coupling state is retained until all axes involved have actually come to a
standstill. The MASLOFS and MASLOF operations are identical; the slave spindle is not
decelerated automatically.
1 Coupling and disconnection takes place immediately and therefore during motion.
During coupling, the slave spindles are accelerated automatically to the current speed of
the master spindle.
On disconnection, the slave spindles rotating at this time retain their speeds until next
speed programming. However, a slave spindle disconnected with MASLOFS decelerates
automatically.
TE3: Speed/torque coupling, master-slave
12.7 Response on activation/deactivation
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