Siemens SINUMERIK 840D sl Function Manual page 912

Synchronous Spindles (S3)
Brief description
Reset and recovery
Resetting the IS "Disable synchronization" (DB31, ... DBX31.5) has no impact on the
following spindle offset. If the offset motion of the following spindle has been suppressed by
the VDI interface signal, then the offset is not automatically applied when the VDI signal is
reset.
Synchronization is recovered as follows:
● By repeating the part program instruction COUPON (FS, LS, offset) with IS "Disable
● By setting the IS "Resynchronize" (DB31, ... DBX31.4) = 1
Read offset
The following system variables can be used to read three different position offset values of
the following spindle from the part program and synchronized actions. The variable
$P_COUP_OFFS[Sn] is only available in the part program.
Description
Programmed position offset of the synchronous spindle
Position offset of synchronous spindle, setpoint end
Position offset of synchronous spindle, actual value end
"Feedrate stop/spindle stop"
By configuring bit 4 in the MD30455 MISC_FUNCTION_MASK, the behavior of the axial IS
"Feedrate stop/Spindle stop" (DB31, ... DBX4.3) are defined for the following spindle.
Bit 4 = 0 compatibility method:
Canceling feed enable for the following spindle decelerates the coupling assembly.
Bit 4 = 1:
Feedrate enable refers only to the interpolation component (SPOS),..) and does not affect
the coupling.
Note
Other configuration options for axis functions using MD30455
$MA_MISC_FUNCTION_MASK:
References:
/FB1/ Function Manual, Basic Functions; Round Axes (R2), Section "Programming Round
Axes
912
synchronization" (DB31, ... DBX31.5) = 0.
COUPON (FS, LS, offset) can be written e.g. in an ASUB.
NCK variable
$P_COUP_OFFS[Sn]
$AA_COUP_OFFS[Sn]
$VA_COUP_OFFS[Sn]
Function Manual, 03/2009, 6FC5397-1BP10-4BA0
Extended Functions