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Rotary absolute encoder
During adjustment with the rotary absolute encoder, a range is aligned symmetrically around
the zero point with half the encoder range within which the position is restored after switch
off/on.
If position tracking is deactivated (p2720.0 = 0), only one encoder overflow is permitted to
occur in this range (for further information, see Chapter "Actual position value preparation
(Page 635)").
If the reference point (p2599) is in the encoder range, the actual position value is set to the
reference point during adjustment. Otherwise, adjustment is canceled with F07443.
NOTICE
Material damage caused when using the encoder outside the defined encoder range
If a rotary absolute encoder is used outside the defined encoder range, then undesirable
motion can occur after switching off/switching on. This can damage the machine.
• After adjustment, ensure that the encoder range that has been set up is not exited.
• Activate position tracking (p2720.0) if there is a risk that the encoder range is exited.
Linear absolute value encoder
No overflow occurs with linear absolute encoders, This means that the position can be
restored over the entire traversing range after switching off/on once the position has been
adjusted. During adjustment, the actual position value is set in line with the reference point.
Absolute encoder adjustment with offset transfer
In addition to the previously described method, the adjustment can also be carried out using
the "Absolute encoder adjustment with offset acceptance" function.
Adjusting
The "Absolute encoder adjustment with offset acceptance" is realized by determining and
accepting an offset value while the drive is being commissioned for the first time.
When determining the offset, the encoder actual value is aligned once with the machine
zero; it is then set as being valid, and the system synchronizes to the absolute position that
has been determined. It is not necessary that the axis is located at a defined reference
position.
After the drive has been switched off the encoder position information is retained. This
means that the axis does not have to be readjusted when the drive powers up.
Enclosed Drives
Operating Instructions, 12/2018, A5E36652151A
Functions, monitoring and protective functions
9.4 Extended functions
663
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