Siemens SINUMERIK 840D Function Manual page 861

Program code
N54 M0
N57 COUPOF(S2,S1)
N99 M30
Reset and recovery
Resetting the IS "Disable synchronization" (DB31, ... DBX31.5) has no effect 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 operation COUPON (FS, LS, offset) with IS "Disable
synchronization" (DB31, ... DBX31.5) = 0.
COUPON (FS, LS, offset) can be written e.g. in an ASUB.
● 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 MD30455 MISC_FUNCTION_MASK, the behavior of the axial
IS "Feedrate stop/Spindle stop" (DB31, ... DBX4.3) is 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:
Further information
R2: Rotary axes (Page 221)
Axes and spindles
Function Manual, 06/2019, A5E47437747B AA
S3: Synchronous spindle
Comment
; are set and the block change
; is enabled.
NC variable
$P_COUP_OFFS[Sn]
$AA_COUP_OFFS[Sn]
$VA_COUP_OFFS[Sn]
19.1 Brief description
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