Detailed Description
2.6 Referencing with absolute value encoders
Reference Point Approach (R1)
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
2-29
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
2.6 2.6 Referencing with absolute value encoders
2.6.1 Information about calibration
Referencing with absolute value encoders
The advantage of machine axes with absolute encoders is that the reference point approach
required with incremental measuring systems after, for example:
Power on of controller (POWER ON)
or
Deselection of "Parking" of machine axis
can be omitted after a one-time adjustment operation, and the actual value system of the
machine axis is immediately synchronized to the determined absolute position.
Adjustment
Adjustment of an absolute encoder involves matching the actual value of the encoder with
the machine zero once and then setting it to valid.
The current adjustment status of an absolute encoder is indicated in the following axis-
specific machine data element of the machine axis on which the absolute encoder is
connected.
MD34210 $MA_ENC_REFP_STATE (status of absolute encoder)
Status Meaning
0 Encoder not calibrated
1 Encoder adjustment enabled
2 Encoder is calibrated
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