Lenze 8400 - Optimising the Control Mode

5 Motor control (MCTRL)
5.9 Servo control (SC)
240
Lenze · 8400 HighLine · Reference manual · DMS 12.0 EN · 06/2017 · TD23
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5.9.4 Optimising the control mode
The "optimisation steps" given in the table below serve to further optimise the control behaviour of
the servo control and adjust it to the concrete application.
• Detailed information on the individual steps can be found in the following subchapters.
Generally, the following optimisation steps are recommended:
 Note!
When the inverter has been enabled, starting up is delayed by the magnetization
process of the motor. The speed setpoint is only enabled for motor control if 87 % of the
motor magnetising current are available. If this delay is not tolerable for certain
applications, the preset percentage threshold can be reduced in C00918
.
From version 12.00.00:
• Following successful motor parameter identification, the current controller
parameters (C00075
, C00076) and field controller parameters (C00077, C00078) are
calculated automatically.
• If these parameters are not
to be calculated, bit 4 of C02865/1 must be set to "1".
• Following successful motor parameter identification, the speed controller parameters
(C00070/2
, C00071/2, C00072) can be calculated automatically.
• If these parameters are to be calculated, bit 6 of C02865/1
must be set to "5".
• Following successful motor parameter identification, other controller parameters
(C00011
, C00022, C00497) can be calculated automatically.
• If these parameters are to be calculated, bit 6 of C02865/1
must be set to "6".
Optimisation steps
1 Optimise current controller
. ( 241)
• The current controller should always be optimised if a motor of a third-party manufacturer with
unknown motor data is used!
2. Optimise speed controller
. ( 242)
• The setting of the speed controller must be adapted depending on the mechanical path.
3. Optimise response to setpoint changes and determine mass inertia
. ( 245)
• For an optimal reference behaviour, the total moment of inertia can be used to make a feedforward
control of the speed setpoint.