Siemens SINUMERIK 840D sl Function Manual page 1555

Terminating reference point approach
Acknowledgment that reference point approach of a machine axis has been successfully
completed is given by setting the referencing status:
DB31, ... DBX60.4 (referenced / synchronized 1)
DB31, ... DBX60.5 (referenced / synchronized 2)
Aborting reference point approach
In axis-specific reference point approach, the machine axis is traversed in the channel that
was assigned as the master channel of the machine axis.
MD30550 $MA_ AXCONF_ASSIGN_MASTER_CHAN
For aborting the reference point approach, either mode group reset or channel reset for the
master channel of the machine axis must be activated:
DB11, ... DBX0.7 (mode group reset)
DB21, ... DBX7.7 (channel reset)
All machine axes that have not yet successfully completed reference point approach when
the action is cancelled remain in status "Not referenced":
DB31, ... DBX60.4 (referenced / synchronized 1)
DB31, ... DBX60.5 (referenced / synchronized 2)
2.2 Channelspecific referencing
In channel-specific reference point approach, all machine axes of the channel are referenced
in the parameterized sequence when reference point appraoch is initiated.
Selecting mode and machine function
Before starting reference point approach of the machine axes, you must first set the mode
group to JOG or MDA mode:
DB11, ... DBX0.2 (JOG mode)
DB11, ... DBX0.1 (MDA mode)
Then machine function REF (reference point approach) must be selected:
DB11, ... DBX1.2 (Machine function REF)
Basic logic functions: Reference Point Approach (R1)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
Detailed description
2.2 Channelspecific referencing
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