Siemens SINUMERIK 802D sl Function Manual page 399

Deactivation during motion
An active coupling is disconnected using the MASLOF instruction.
This instruction is executed directly for a spindle in speed control mode. The slave spindle
that is rotating at this point in time retains its most recently used speed until the speed is
reprogrammed.
You can use the MASLOFS instruction to decelerate slave spindles automatically when
disconnecting the coupling. For axes and spindles in positioning mode, the coupling is still
only disconnected at standstill.
Note
The implicit preprocessor stop is omitted for
stop means that the $P system variables of the slave spindle do not supply updated values
until reprogrammed.
Coupling characteristics
For spindles in speed control mode, the coupling characteristics of the
MASLOFS
(V380x 5000.7) are defined explicitly via the following machine data:
MD37263 MS_SPIND_COUPLING_MODE
MD37263 = 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 instructions are identical; the slave spindle is not
decelerated automatically.
MD37263 = 1
Coupling and disconnection takes place immediately and therefore during motion.
During coupling, the slave spindles are automatically accelerated to the current speed of the
master spindle.
On disconnection, the slave spindles rotating at this point retain their speeds until the speed
is reprogrammed. However, a slave spindle disconnected with MASLOFS decelerates
automatically.
Turning, Milling, Nibbling
Function Manual, 11/2012, 6FC5397-1CP10-5BA0
, and instructions, as well as the PLC with IS "Master/slave on"
MASLDEL
Speed/torque coupling, master-slave (TE3)
23.7 Response on activation/deactivation
and . The missing preprocessor
MASLON MASLOF
, ,
MASLON MASLOF
399