Menu 13
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Performance RFC mode
244 Unidrive SP Advanced User Guide
www.controltechniques.com Issue Number: 10
is used. This allows all three parts of the local reference position to be changed without data skew problems.
The local reference consists of a turns, a position and a fine position value. When Pr 13.24 is zero the reference is a 48bit position made from these
three values.
If Pr 13.24 is set to one the local reference is a 32bit position made from the position and fine position values. The position delta, used as the input to
the position controller, is calculated correctly even when the turns are ignored as the 32bit position is treated as a roll-over/roll-under counter. This
feature can be used, for example, with the local reference when only the position (and not the turns or fine position) is available. This feature is not
available when absolute mode is selected (Pr 13.11 = 1).
13.24 Ignore local reference turns
Drive modes Open-loop, Closed-loop vector, Servo
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
111
Default Open-loop, Closed-loop vector, Servo 0
Update rate 4ms read
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