Lenze EDS4900U-REG - Manual (Page 105)

Configuration
7-14 48XX/49XXSHB0399
7.1.3 Adaptation and adjustment fo the control circuit parameters
7.1.3.1 Adaptation of the armature time constant
If the armature time constant set under C084 (T
SR
) is not the same as the effective
time constant of the motor (T
armature
) (see chapter 5.2), the following occurs:
C084 Effect Remedy
T
SR
> T
armature
Overcurrents in the armature
possible, the semi-conductor
fuses may trip. Reduction of C084:
l Jump signal to the current controller (e.g. enable the
controller when a set-value is applied and the field
current is C083 = 0A (motor not running))
l Observe the signal flow at the monitor output term. 61
by means of an oscilloscope.
l Reduce C084 so that the current can be controlled as
fast as possible without overshooting.
T
SR
< T
armature
Armature current controls too
slowly. Drive provides only little
dynamic response. Increase of C084 under the same criteria as described
above.
7.1.3.2 n
max
setting
C011 maximum speed
The set-value setting range is determined through n
max
. Enter n
max
in rpm under
C011. n
max
can be between 250 rpm...5000 rpm. Default setting is 3000 rpm. n
max
is the reference value for the setting of the deceleration and acceleration times T
ir
and T
if
.
Stop!
If the additional set-value is added to the main set-value , the speed set-value C050
can reach up to 180% of n
max
.
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