Configuration
Function blocks
Master frequency processing (DFSET)
8
8.2
8.2.5
8.2-23
EDSVF9333V EN 3.0-06/2005
Speed trimming
The speed trimming serves to add correction values, e. g. by a superimposed
control loop. This enables the drive to accelerate or decelerate.
ƒ At the speed trimming, an analog value at DFSET-N-TRIM is added to
the speed setpoint.
Phase trimming
The phase trimming adds a setpoint at DFSET-A-TRIM to the phase setpoint
and changes the rotor position to the setpoint with the number of
increments provided in either direction (drive is leading o r lagging). The
phase is trimmed within a range of ±32767 increments (corresponds to
±½ revolution). Every analog signal can be used as a source.
ƒ The input is done is i ncrements (1 revolution ≙ 65536 increments).
ƒ An analog input signal at DFSET-A-TRIM of
100 % ≙ 1/4 revolution ≙ 16384 increments.
ƒ You can extend the setting range with a multiplier (C0529).
Phase offset
The phase offset (C0252) adds a fixed phase offset to the setpoint of the
drive.
Phase adjustment proportional to speed
With a phase adjustment proportional to speed, the phase leads or lags with
increasing speed.
ƒ Enter the offset in increments under C0253.
ƒ The set phase offset is reached at 15000 rpm of the drive (linear
relationship).
Note!
Phase corrections are only reasonable if the controller is
operated with incremental encoder feedback and the calculated
following error is used for correcting the speed setpoint. The
following error is output to DFSET-PSET.
Processing of correction
values
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