Siemens sinumerik 840D sl Function Manual page 289

Reference system
The calculations are made in the basic co-ordinate system BCS.
Synchronous actions
Synchronous actions (see Literature: /FBSY/) are not supported.
Block search
EG commands are ignored in the case of block search.
Mode change
In the case of a mode change:
• the EG status remains unchanged
• the EG configuration is retained
RESET
For RESET:
• the EG status remains unchanged
• the EG configuration is retained
End of parts program
On end of a part program:
• the EG status remains unchanged
• the EG configuration is retained
Warm start and cold start
In the case of a warm start per HMI operation and cold start (POWER OFF/ POWER ON):
• the EG status does not remain unchanged
• the EG configuration is not retained
Violated synchronism conditions
If the synchronism conditions are violated, all axes are stopped. In this case, their positions
are checked by the control up to the stop. Extended stop and retract (ESR) may be active in
this situation, see Chapter "Extended Stop and Retract (ESR)".
Special functions: Axis Couplings and ESR (M3)
Function Manual, 11/2006, 6FC5397-2BP10-2BA0
Detailed description
2.4 Electronic gearbox (EG)
69