Siemens SINUMERIK 828D Function Manual page 1234

R1: Reference point approach
15.8 Referencing in follow­up mode
Aborting the reference operation
An active referencing operation can be aborted by:
• Deselecting follow-up mode
• NCK Reset
Response when measuring systems are already referenced
A measuring system that has already been referenced can only be re-referenced in AUTOMATIC mode using
part program instruction G74.
Sequence of referencing operation (AUTOMATIC mode)
1. Switch to AUTOMATIC mode.
2. Start the part program.
3. Activate follow-up mode of machine axis:
DB31, ... DBX1.4 (follow-up mode) = 0
DB31, ... DBX2.1 (servo enable) = 0
4. Take into account activation of follow-up mode:
DB31, ... DBX61.3 (follow-up mode active) = 1
5. The referencing operation is started internally in the NC as soon as part program instruction G74 is
processed.
6. External movement of machine axis across encoder zero mark or parameterized number of distance-coded
reference marks.
7. The measuring system is referenced after the encoder zero mark or the assigned number of distance-coded
reference marks have been successfully detected:
DB31, ... DBX60.4 / 60.5 (referenced/synchronized 1/2) = 1
8. The block change occurs after the referencing operation has been successfully completed.
Aborting the reference operation
An active referencing operation can be aborted by:
• Deselecting follow-up mode
• NCK Reset
Response when measuring systems are already referenced
A measuring system that you have already referenced can be referenced again.
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Function Manual, 09/2011, 6FC5397-0BP40-2BA0
Basic Functions