Detailed Description
2.1 Axis-specific referencing
Reference Point Approach (R1)
2-2 Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
If the machine operator releases the direction key, the machine axis is decelerated to zero
speed. Reference point approach is not aborted. Reference point approach is continued the
next time the direction key is pressed.
Referencing status
When reference point approach is started, the referencing status of the machine axis is
reset:
DB31, ... DBB60.4 (referenced/synchronized 1)
DB31, ... DBB60.5 (referenced/synchronized 2)
DB21, ... DBB36.2 (all axes with obligatory reference point are referenced)
Distance-coded measuring systems
In distance-coded measuring systems, reference point approach can be started with any
traversing key.
Sequence
The machine operator or machine manufacturer (via the PLC user program) is responsible
for ensuring that the machine axes are referenced in the proper order.
• Machine operator
The machine axes must be started by the machine operator in the specified order.
• Machine manufacturer
The PLC user program of the machine manufacturer allows machine axes to be started
only in the proper order.
Simultaneous reference point approach of several machine axes
Several machine axes can be referenced simultaneously depending on the control type:
• SINUMERIK 840D: Max. 8 machine axes
• SINUMERIK 810D: Max. 5 machine axes
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, ... DBB60.4 (referenced/synchronized 1)
DB31, ... DBB60.5 (referenced/synchronized 2)
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