Detailed description
2.5 Referencing with distancecoded reference marks
Basic logic functions: Reference Point Approach (R1)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
33
Machine axis with reference point cam
MD34000 $MA_REFP_CAM_IS_ACTIVE (Axis with reference point cam) = 1
Properties:
• Feedrate override is not active.
Machine axis moves internally when feedrate override = 100%.
If a feedrate override of 0% is specified, an abort occurs.
• The feed stop (channelspecific and axisspecific) is active.
• NC-STOP and NC-START are not active.
• If the parameterized number of reference marks is not detected within the parameterized
distance after the exit of the reference cam, the machine axis will be stopped.
MD34060 $MA_REFP_MAX_ MARKER_DIST (max. distance to the reference mark)
Special features of rotary measuring systems
On rotary distancecoded measuring systems, the absolute position can only be determined
uniquely within one revolution. Depending on the mechanical mounting of the encoder, the
overtravel of the absolute position in the hardware does not always coincide with the
traversing range of the rotary axis.
Special features of modulo rotary axes
With module rotary axes, the reference point position is mapped on the parameterized
modulo range:
MD30330 $MA_MODULO_RANGE (extent of modulo range)
MD30340 $MA_MODULO_RANGE_START (starting position of modulo range)
Note
The reference point position is mapped onto the assigned (ghost) modulo range even with
axis function "Determination of reference point position rotary, distance-coded encoder within
the configured modulo range":
MD30455 $MA_MISC_FUNCTION_MASK (axis functions), BIT1 = 1
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