Technical description 8100_ A
35
7.2.7 CHOPPING FREQUENCY FCH C018
The desired chopping frequency of the output voltage can be set under C018.
Note: The chopping frequencies limit the effective maximum field frequency
fdmax.
.
7.2.8 RESPONSE THRESHOLD AUTO DC INJECTION BRAKING C019
DC injection braking is activated when the actual frequency is less than the
frequency set under C019. When setting 0.0 Hz, this function is not active.
The amount of the stand still voltage can be set under C036, the time of the DC
injectionbrakingcan be set under C107.
7.2.9 PRESELECTION OF ENCODER C025
Errors which may occur in the encoder or in the transmission path, can be
compensated by adjusting the set- and actual value inputs.
The analog inputs can be adjusted, if offset and gain are required.
For the pulse train/incremental encoder input X5, a gain setting is provided. For
open-Ioop operation with digital frequency input (C005
= -2-) and for the closed-
loop operation with incremental encoder feedback (C005 = -13-) the input X5 is
adjusted under C025
= -10-. In closed-Ioop operation with digital frequency input
and incremental encoder feedback (C005
= -16-) the adjustment for single-track
digital frequency input (via X5, track 0, Oll is done by C025 = -11- and the
adjustment of two-pulse incremental encoder feedback (via X5, tracks A, AI, B, BI) is
done by C025 = -10-
First select the encoder under C025, then make the adjustment under C026, C027
for the selected input.
lenze
C018 fCH
eff. fdmax
kHz Hz
-0- 1.0 120
I
-1-
1.5 180
-2-
2.0 240
-3- 3.3 480
I
-4-
3.6 480
-5- 4.0 480
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