Optidrive Eco Advanced User Guide Revision 1.00
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Parameter Group 4 – High Performance Motor Control
Par.
Name
Minimum
Maximum
Default
Units
Incorrect adjustment of parameters in menu group 4 can cause unexpected behaviour of the motor and any connected machinery.
It is recommended that these parameters are only adjusted by experienced users.
P4-01
Motor Control Mode
0
5
0
-
Selects the motor control method. An autotune should be performed for all modes but is mandatory for modes 2 - 5.
0 : Eco Vector Speed Control (VT). Suitable for use with AC induction motors with a variable torque load such as centrifugal fans or
pumps where the voltage to frequency characteristic follows a quadratic relationship.
1 : Eco Vector Speed Control (CT). Suitable for use with AC induction motors with a constant torque load such as blowers or positive
displacement pumps where the voltage to frequency characteristic follows a linear relationship..
2 : IM Vector Speed Control. Similar to mode 1 but requires more accurate motor information including motor power factor P4-05.
3 : PM Motor Vector Speed Control. Equivalent to setting 1, but intended for operation of Permanent Magnet motors.
4 : BLDC Motor Speed Control. For operation of Brushless DC Motors.
5 : SynRel Motor Speed Control. For operation of Synchronous Reluctance Motors.
P4-02
Motor Parameter Auto-tune Enable
0
1
0
-
When set to 1, the drive immediately carries out an autotune to measure the motor parameters for optimum control and efficiency.
Following completion of the autotune, the parameter automatically returns to 0.
Note
All motor nameplate data should be programmed into the drive, e.g. P1-07, P1-08, P1-09 and P4-05 prior to starting the autotune
Whilst the autotune does not require the motor to rotate, it may still cause some movement of the motor shaft,
thereby it is important to ensure that the motor and load are safe to operate prior to starting the autotune.
The autotune does not require the load to be removed from the motor, however the motor brake should be
released providing it is safe to do so. The motor must be stationary during the auto-tune procedure, if the motor
is rotating then the auto-tune will fail or incorrect motor data will be measured by the drive.
P4-03
Vector Speed Controller Proportional Gain
0.1
400.0
50.0
%
Sets the proportional gain value for the speed controller when operating in Vector Speed or Vector Torque motor control modes (P4-
01 = 0 or 1). Higher values provide better output frequency regulation and response. Too high a value can cause the speed to
overshoot the setpoint during acceleration, and may also cause speed instability and possibly over current trips. For applications
requiring best possible performance, the value should be adjusted to suit the connected load by gradually increasing the value and
monitoring the actual output speed of the load until the required dynamic behaviour is achieved with little or no overshoot of the
target speed during acceleration and deceleration.
In general, higher friction loads can tolerate higher values of proportional gain, and high inertia, low friction loads may require the gain
to be reduced.
P4-04
Vector Speed Controller Integral Time Constant
0.010
2.000
0.050
Seconds
Sets the integral time for the speed controller. Smaller values provide a faster response in reaction to motor load changes, at the risk
of introducing instability. For best dynamic performance, the value should be adjusted to suit the connected load.
P4-05
Motor Power Factor Cos Ø
0.00
0.99
-
-
When operating in Vector Speed or Vector Torque motor control modes, this parameter must be set to the motor nameplate power
factor before an autotune is carried out.
P4-07
Maximum Motoring Torque Limit
P4-08
150.0
110.0
%
This parameter defines the maximum torque limit (or current limit) of the drive
P4-12
Motor Thermal Memory Retention
0
1
0
-
0 : Disabled. The present value of the motor overload accumulator is not stored during power off.
1 : Enabled. The value of the motor thermal overload accumulator is stored during power off.
Whilst the motor is being operated, the drive continuously monitors the output current over a time period, to determine the likely
operating temperature of the motor. If the motor operates at high current for a period of time, the drive may trip to protect the motor
and prevent damage. When this function is disabled (default setting), removing the power supply from the drive will result in the
thermal overload value for the motor being reset to zero, hence the motor could potentially be operated and damaged. By enabling
this parameter, even if the mains power is removed from the drive, the value is retained, and reused at the next power on, in order to
avoid the risk of damage to the motor.
P4-13
Output Phase Sequence
0
1
0
-
0 : U, V, W.
1 : U, W, V. Direction of motor rotation when operating in a forward direction will be reversed.
