Siemens SINUMERIK 840D sl Function Manual page 1681

Note
Mfunctions M3, M4, M5, and M70 are not output in DB21, ... DBB194 and DBB202 if a spindle
is configured in a channel. These M functions are offered as extended M functions in DB21, ...
DBB68 ff. and in the relevant axis DBs, DB31, ... DBB86 ff.
Detailed explanations for programming the spindle can be found under:
Literature:
/PG/ Programming Manual Basics
2.5.2 Programming via synchronized actions
M40 to M45
Mfunctions M40 to M45 can also be programmed in synchronized actions.
Please note:
• Programming ofM40...M45 in the part program has no effect on the current status of the
• When programming S values with M40, automatic gear step change is effective
For synchronized actions:
• M40 is deactivated after POWER ON.
• An M40 command programmed using synchronized actions always remains active for
M41...M45 selects the first to fifth gear step according to the programming instructions in the
part program.
Please note:
• An axis replacement is necessary in order to run the function.
• Once the gear step change has been performed, the spindle status is neutral (same
Further explanations regarding the programming of spindle as well as spindle movements
from synchronized actions can be found under:
Literature:
/PGA/ Programming Manual Work Preparation
/FBSY/ Function Description Synchronized Actions
Basic logic functions: Spindles (S1)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
automatic gear step change of synchronized actions, and vice versa.
separately for synchronized actions and the part program.
The gear step is not adjusted if an S value is specified from a synchronized action.
synchronized actions (modal) and is not reset on RESET.
response as M3, M4, M5 instructions).
Detailed Description
2.5 Programming
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