Lenze 4800 Manual page 105

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Configuration
7.1.3
7.1.3.1
7.1.3.2
7-14
48XX/49XXSHB0399
Adaptation and adjustment fo the control circuit parameters
Adaptation of the armature time constant
If the armature time constant set under C084 (T
time constant of the motor (T
C084 Effect
T > T Overcurrents in the armature
SR armature
possible, the semi-conductor
fuses may trip.
T < T Armature current controls too
SR armature
slowly. Drive provides only little
dynamic response.
n setting
max
C011 maximum speed
The set-value setting range is determined through n
C011. n 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
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
) is not the same as the effective
SR
) (see chapter 5.2), the following occurs:
armature
Remedy
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.
Increase of C084 under the same criteria as described
above.
.
max
. Enter n in rpm under
max max
max
ir