Siemens SINUMERIK 840D sl Function Manual page 1270

S1: Spindles
16.6 Selectable spindles
The converted, physical spindle number is always output as the address extension in the
auxiliary function output.
Supplementary conditions
● Switchable channel spindles are not a substitute for the Axis replacement function.
● You can only switch spindles, which have been assigned to the channel by means of
configuration.
● If spindles, which are presently active in another channel, are designated for switchover,
either the "Auto-Get" function is triggered for the physical spindle or alarm 16105 "Assigned
spindles do not exist" is output, depending on the configuration variant.
● If SD42800 $SC_SPIND_ASSIGN_TAB[<n>] is specified by the PLC or from HMI, then the
channel whose table is changed should be in Reset status or the spindle to be changed
should not be used in the running part program.
A synchronized response can be achieved by means of a STOPRE preprocessor stop.
● The multiple mapping of logical to physical spindles is not prevented in the NC. However,
with the display of logical spindle in the user interface, there are ambiguities corresponding
to the change table.
● Spindle conversion operates on spindles via FC 18.
Activation
SD42800 $SC_SPIND_ASSIGN_TAB[<n>] is enabled by setting the following machine data
setting:
MD20092 $MC_SPIND_ASSIGN_TAB_ENABLE=1
Basic setting SD42800
After switching on the NC with the commissioning switch in setting 1 (delete SRAM) SD42800
$SC_SPIND_ASSIGN_TAB[<n>] is in the basic setting.
The numbers of the logical and physical spindles are identical.
SD42800 $SC_SPIND_ASSIGN_TAB[1] = 1
SD42800 $SC_SPIND_ASSIGN_TAB[2] = 2
SD42800 $SC_SPIND_ASSIGN_TAB[3] = 3
SD42800 $SC_SPIND_ASSIGN_TAB[4] = 4
SD42800 $SC_SPIND_ASSIGN_TAB[5] = 5
...
Example
Spindle configurations:
● Assignment, spindle number and machine axis:
1270
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
Basic Functions