Siemens SINUMERIK 840D Function Manual page 742

S1: Spindles
18.2 Operating modes
● Spindle-specific and cross-channel activation via the machine data:
MD35035 $MA_SPIND_FUNCTION_MASK (spindle functions)
Note
Activation via MD35035 should be preferred when using a spindle in multiple channels (axis/
spindle exchange).
The auxiliary function M19 is implicitly generated if either of the MD configurations = 1.
After activation, the minimum duration of an SPOS/SPOSA block is increased to the time for
output and acknowledgment of the auxiliary functions by the PLC.
The properties of the implicitly generated auxiliary function output M19 are "Quick" and "Output
during motion". These properties are fixed settings and are independent of the M19
configuration in the auxiliary function-specific machine data (MD..._$M..._AUXFU_...).
There is no auxiliary function M19 implicitly generated in the case of spindle positioning
commands via FC 18.
End of positioning
The positioning can be programmed with:
FINEA[S<n>]:
COARSEA[S<n>]:
IPOENDA[S<n>]:
In addition, an end-of-motion criterion for block changes can be set in the braking ramp
(100-0%) with IPOBRKA for single-axis interpolation.
Further information
P2: Positioning axes (Page 185)
Block change
The program advances to the next block if the end-of-motion criteria for all spindles or axes
programmed in the current block, plus the block change criterion for path interpolation, are
fulfilled. This applies to both part-program and technology-cycle blocks.
742
Bit Value Meaning
19 0 If bit 0 is also set to "0" in the MD20850 $MC_SPOS_TO_VDI, no
auxiliary function M19 is generated in SPOS and SPOSA. This
therefore eliminates the acknowledgment time for the auxiliary
function.
1 The implicit auxiliary function M19 is generated and output to the
PLC during the programming of SPOS and SPOSA. The address
extension corresponds to the spindle number.
End of motion on reaching "Exact stop fine" (DB31, ... DBX60.7)
End of motion on reaching "Exact stop coarse" (DB31, ...
DBX60.6)
End of motion on reaching "IPO stop"
Axes and spindles
Function Manual, 06/2019, A5E47437747B AA