Detailed description
2.1 Axisspecific referencing
Basic logic functions: Reference Point Approach (R1)
8 Function Manual, 11/2006, 6FC5397-0BP10-2BA0
Jog mode
The following machine data element can be used to specify whether reference point
approach is completed when the direction key is pressed once or whether the operator is
required to keep the direction key pressed (jogging) for safety reasons:
MD11300 $MN_JOG_INC_MODE_LEVELTRIGGRD (INC and REF in jog mode)
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, ... DBX60.4 (referenced / synchronized 1)
DB31, ... DBX60.5 (referenced / synchronized 2)
DB21, ... DBX36.2 (all axes with obligatory reference points 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
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