Lenze 8400 User Manual

5 Motor control (MCTRL)
5.3 Defining current and speed limits
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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 C00011
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
C00011
.
 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 (C00011
) = 1500 ... 3000 rpm
Irrespective of the selected motor control, there are more limitation options:
Parameters Info Lenze setting
Value Unit
C00909/1 Max. positive speed 120 %
C00909/2
Max. negative speed 120 %
C00910/1
Max. positive output frequency 1000 Hz
C00910/2
Max. negative output frequency 1000 Hz
 Note!
In the torque-controlled operation (bTorquemodeOn = TRUE), the limitation of the speed
setpoint set in C00909/x
has no impact!
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 LS_MotorInterface
).
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!

Lenze 8400 Specifications

General

Category	DC Drives
Series	8400
Protection class	IP20
Control Type	Vector control
Communication	CANopen, PROFIBUS, Ethernet
Protection Features	Overcurrent, overvoltage, undervoltage, overtemperature
Input Voltage	AC 230/400/480 V