Siemens SINUMERIK 840Di Function Manual page 1487

Sequence of referencing operation (AUTOMATIC mode)
1. Switch to AUTOMATIC mode.
2. Start the part program.
3. Activate follow-up mode of machine axis:
4. Take into account activation of follow-up mode:
5. The referencing operation is started internally in the NC as soon as part program
6. External movement of machine axis across encoder zero mark or parameterized number
7. The measuring system is referenced after the encoder zero mark or the assigned number
8. The block change occurs after the referencing operation has been successfully
Aborting the reference operation
An active referencing operation can be aborted by:
• Deselecting follow-up mode
• NC-RESET
Response when measuring systems are already referenced
A measuring system that you have already referenced can be referenced again.
2.9 Zero mark selection with BERO
2.9
Functionality
Referencing of incremental measuring systems is based on the unique position of the
encoder zero mark relative to the overall traversing range of the machine axis. If several
encoder zero marks are detected in the traversing range of the machine axis due to
machine-specific factors, e.g., reduction gear between encoder and load, a BERO must be
mounted on the machine and connected to the relevant drive module (SIMODRIVE 611D)
via a BERO input in order to uniquely specify the reference point. The position of the
reference point is then derived from the combination of BERO signal and encoder zero mark.
Reference Point Approach (R1)
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
DB31, ... DBX1.4 (follow-up mode) = 0
DB31, ... DBX2.1 (servo enable) = 0
DB31, ... DBX61.3 (follow-up mode active) = 1
instruction G74 is processed.
of distance-coded reference marks.
of distance-coded reference marks have been successfully detected:
DB31, ... DBX60.4/60.5 (referenced/synchronized 1/2) = 1
completed.
Detailed Description
2.9 Zero mark selection with BERO
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