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5
Motor control (MCTRL)
5.3
Defining current and speed limits
154
Lenze · 8400 HighLine · Reference manual · DMS 12.0 EN · 06/2017 · TD23
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5.3
Defining current and speed limits
Limitation of the speed setpoint
Parameterising the reference speed in
means that the drive must rotate at the set speed if
a speed setpoint of 100% is specified.
All speed setpoint selections are provided in % and always refer to the reference speed set in
Tip!
For reasons of achievable resolution and the accuracy involved, the reference speed should
be geared to the speed range required for the respective application.
Lenze recommendation: Reference speed (
) = 1500 ... 3000 rpm
Irrespective of the selected motor control, there are more limitation options:
Parameters
Info
Lenze setting
Value Unit
Max. positive speed
120 %
Max. negative speed
120 %
Max. positive output frequency
1000 Hz
Max. negative output frequency
1000 Hz
Note!
In the torque-controlled operation (
bTorquemodeOn
= TRUE), the limitation of the speed
setpoint set in
For the torque-controlled operation, a permissible speed range can be defined via the
speed limitation (inputs
nSpeedHighLimit_a
and
nSpeedLowLimit_a
at the
SB
For a correct function of the speed limitation in both direction, the following applies:
The speed limitation operates with a internal hysteresis of 50 min
-1
. The upper or lower
speed limit resulting from the settings has to be higher than this hysteresis!