Siemens SINUMERIK 840DE SL - 2.6.6 Reference point approach with absolute encoders

Detailed Description
2.6 Referencing with absolute value encoders
Reference Point Approach (R1)
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
2-37
Note
If the BERO is removed after adjustment of the absolute encoder, the referencing mode
must be assigned to "Referencing with absolute encoder".
MD34200 $MA_ENC_REFP_MODE = 0
Signal propagation delay compensation
The signal propagation time can cause corruption of the absolute position detected by the
NC. The signal propagation time can be compensated for in any direction:
MD31122 $MA_BERO_DELAY_TIME_PLUS (BERO delay time plus)
MD31123 $MA_BERO_DELAY_TIME_MINUS (BERO delay time minus)
Note
A requirement for correct compensation of the signal propagation delay are
SIMODRIVE 611-D drives. The assignments made in the factory for the compensation times
do not usually have to be changed.
Creep velocity
If the BERO is to be approached at the assigned reference point creep velocity:
MD34040 $MA_REFP_VELO_SEARCH_MARKER
reference mode "BERO with configured approach velocity for spindles" must be assigned:
MD34200 $MA_ENC_REFP_MODE = 7
2.6.6 Reference point approach with absolute encoders
MD34330
If reference point approach is initiated for a machine axis with adjusted absolute encoder as
the active measuring system (manually in JOG-REF mode or automatically via part program
instruction (G74)), the movement of the machine axis is dependent on the assigned
traversing enable:
MD34330 $MA_REFP_STOP_AT_ABS_MARKER = <Value>