Supplementary Conditions; Functional Boundary Conditions - Siemens SINUMERIK 840D sl Function Manual

Switch off with braking
If the coupling is switched off with the MASLOFS program command, the coupling will be
switched off immediately for spindles in speed control mode and the slave spindles braked.
Note
The implicit preprocessing stop is omitted for MASLON and MASLOF. The missing preprocessing
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 (only
840D sl) and the NC/PLC interface signal: DB31, ... DBX24.7 (master/slave on) 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>
16.8

Supplementary conditions

16.8.1

Functional boundary conditions

General
● Master and slave axes must be on the same NCU.
● A coupling is closed or opened independent of the channel state the next time that the axis
is at a standstill.
● Slave axes can only be traversed via the master axis when the coupling is closed.
● A coupled slave axis cannot be switched further via the axis container.
● A requested axis interchange of coupled slave axes is not executed.
Special functions
Function Manual, 01/2015, 6FC5397-2BP40-5BA2
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 stand‐
still. 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 automat‐
ically.
TE3: Speed/torque coupling, master-slave
16.8 Supplementary conditions
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