R1: Reference point approach
15.7 Referencing by means of actual value adjustment
Basic Functions
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
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15.7
Referencing by means of actual value adjustment
15.7.1
Actual value adjustment to the referencing measurement system
Function
When actual value adjustment to the referencing measuring system is performed, the resulting absolute actual
position after successful referencing of the measuring system of a machine axis is transferred directly to all other
measuring systems of the machine axis, and the machine axis is designated as referenced:
DB31, ... DBB60.4 / 60.5 (referenced/synchronized 1/2) = 1
Advantage
When the machine axis switches from an explicitly referenced measuring system to the measuring system
referenced by actual value adjustment, continuous servo control is assured (servo enable active) because the
matched actual position prevents a sudden change in actual value.
Activation
The activation of the actual value adjustment to the referencing measuring system is machine-specifically carried
out via:
MD34102 $MA_REFP_SYNC_ENCS = 1
15.7.2
Actual value adjustment to the referenced measurement system
Function
If a machine axis has several measuring systems and one of them is referenced, the remaining measuring
systems can be referenced by actual value adjustment to the measuring system already referenced.
Advantage
Referencing does not take as long because the path to be traversed only has to be sufficiently along to allow
elimination of the backlash in both measuring systems.
If the distance to the traversing range limits is large enough, referencing can be started at any point along the
traversing range of the machine axis in any direction because no zero mark, reference point cam, etc., is
required.
Note
In order to improve positioning precision by determining the measuring-system-specific
encoder fine information, we recommend explicitly re-referencing the measuring system
previously referenced by actual value adjustment after switching over.
