Siemens SINUMERIK 840Di Function Manual page 1533

• Setting:
Homing sequence
If the spindle is to be programmed in axis mode directly after control power up, it must be
ensured that the axis is homed.
When the control is switched on, the spindle can be homed (condition is one zero mark per
revolution).
Information about the homing sequence can be found in
References:
/FB1/ Descriptions of Functions, Basic Machine; Homing (R1)
The rotary axis is homed at the same time as the spindle is synchronized
(see Synchronization procedure) if the position measurement system used for the spindle is
also used for the rotary axis.
Position measurement systems, spindle
The spindle can be switched from spindle mode to axis mode (rotary axis) if a single motor is
used for spindle mode and axis mode.
The spindle (spindle mode and axis mode) can be equipped with one or two position
measurement systems. With two position measurement systems, it is possible to assign one
position measurement system to the spindle and the other to the rotary axis, or to assign two
position measurement systems to the spindle. Where two position measurement systems
are provided, both are updated by the control, but only one can be active.
NC/PLC IS:
DB31, ... DBX1.5 (position measurement system 1)
and
DB31, ... DBX1.6 (position measurement system 2)
are used to select the active position measurement system.
Spindles (S1)
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
MD34200 $MA_ENC_REFP_MODE = 2
executes position synchronization without specifying a specific velocity/speed.
Note
The overriding of the signal propagation delay by the NC requires the use of type
611D drives.
Signal propagation delays are preset on delivery so that the content generally does not
have to be changed.
Detailed Description
2.2 Reference/Synchronize
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