Siemens SINUMERIK 802D sl Function Manual page 364

Spindle (S1)
20.7 2nd spindle / master spindle
The definition of the master spindle changed in the program is only valid until End of
program/program abort. Thereafter, the configured master spindle is again active.
Programming via spindle number
Some spindle functions can also be selected via the spindle number:
S1=..., S2=...
M1=3, M1=4, M1=5
M2=3, M2=4, M2=5
M1=40, ..., M1=45
M2=40, ..., M2=45
SPOS [n]
SPI(n)
P_S[ n ]
$AA_S[n]
$P_SDIR[ n ]
$AC_SDIR[ n ]
Two spindles available
The following can be interrogated in the program via the system variable:
$P_NUM_SPINDLES
$P_MSNUM
$AC_MSNUM
364
Spindle speed for spindle 1 or 2
Specifications for direction of rotation, stop for spindle 1
Specifications for direction of rotation, stop for spindle 2
Gear stages for spindle 1 (if available)
Gear stages for spindle 2 (if available)
Position spindle n
Converts the spindle number n into the axis identifier,
e.g. "SP1" or "CC"
n must be a valid spindle number (1 or 2)
The spindle identifiers SPI(n) and Sn are identical in terms of
function
Last programmed speed of spindle n
Actual speed of spindle n
Last programmed direction of rotation of spindle n
Current direction of rotation of spindle n
Number of configured spindles (in the channel)
Number of programmed master spindle
Number of active master spindle
Turning, Milling, Nibbling
Function Manual, 11/2012, 6FC5397-1CP10-5BA0