Optidrive Eco Advanced User Guide Revision 1.00
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Par.
Name
Minimum
Maximum
Default
Units
P6-28
P0-80 Display Value Index
0
200
0
-
This parameter defines the index of the internal variable, the value of which will be displayed in P0-80.
This is usually used in conjunction with the Function Block Program. Refer to section 1.6 for further information.
P6-29
Save User Parameters as Default
0
2
0
-
0 : No Function
1 : Save Parameters. Setting this parameter to 1 saves the present drive parameter settings to the User Default Parameters Memory.
Following this, if the User carries out a 3-button default parameter command (UP, DOWN and STOP), the parameter saved at this time
will be restored.
2 : Erase Parameters. Setting 2 clears the User Default Parameters Memory.
P6-30
Advanced Parameter Access Code Definition
0
9999
201
-
Defines the access code which must be entered into P1-14 to allow access to the Advanced Parameters.
1.3.7.
Parameter Group 7 – Motor Data
The following parameters are used internally by the drive to provide optimum possible motor control. Incorrect setting of the
parameters can result in poor performance and unexpected behaviour of the motor. Adjustments should only be carried out by
experienced users who fully understand the functions of the parameters.
Par.
Name
Minimum
Maximum
Default
Units
P7-01
Motor Stator Resistance (Rs)
-
-
-
Ohms
Motor stator resistance value measured during the autotune.
P7-03
Motor Stator Inductance (Lsd)
-
-
-
H
For induction motors: phase stator inductance value.
For permanent magnet motors: phase d-axis stator inductance in Henry (H).
P7-04
Motor Magnetising Current (Id rms)
0.0
-
-
A
For induction motors: magnetizing / no load current. Before Auto-tune, this value is approximated to 60% of motor rated current (P1-
08), assuming a motor power factor of 0.8.
P7-05
Motor Leakage Coefficient (Sigma)
-
-
-
-
For induction motors: motor leakage inductance coefficient
P7-06
Motor Stator Inductance : PM Motors (Lsq)
0
-
-
-
For permanent magnet motors: phase d-axis stator inductance in Henry (H).
P7-09
Over Voltage Current Limit
0.0
100.0
5.0
%
Effective in vector speed control mode only, and will come into function once the drive DC bus voltage increases above a preset limit.
This voltage limit is set internally just below the over voltage trip level. This parameter will effectively limit the output torque current
in order to prevent a large current flowing back to the drive, which may cause an Over-voltage trip. A small value in this parameter will
limit the motor control torque when the drive DC bus voltage exceeds the preset limit. A higher value may cause a significant
distortion in the motor current, which may cause an aggressive, rough motor behaviour.
P7-10
System Inertia Constant
0
600
10
-
System Load Inertia to Motor Inertia Ratio entered as H = (JTot / JMot). This value can normally be left at the default value (10) and is
used by the drive control algorithms as a feed-forward control variable to provide optimum torque current to accelerate the load.
Hence accurate setting of the inertia ratio will produce a better system response and dynamic behaviour.
P7-11
Pulse Width Minimum Limit
0
500
-
-
This parameter is used to limit the minimum output pulse width, which can be used for long motor cable applications. Increasing the
value of this parameter will reduce the risk of over-current trips, but will also reduce the maximum available output motor voltage.
P7-12
Magnetising Period
0
5000
-
ms
Defines the delay time between the output stage enabling at 0.0Hz prior to the output frequency beginning to ramp to accelerate the
motor. This allows time for the motor to correctly magnetise, and avoids possible over current trips that may occur if the output
frequency begins to ramp before the motor flux has stabilised.
P7-14
Low Frequency Torque Boost
0.0
100.0
0.0
%
Effective in all motor control modes, except V/F mode (P4-01 = 2), but primarily intended for use with synchronous motors.
Allows a boost current to be applied at start-up and low frequency (limit defined by P7-15), as a percentage of the motor rated current
(P1-08). Injecting some additional current into the motor at low speed helps to ensure that the rotor alignment is maintained,
imrpoving operation of the motor at lower speeds.
In order to determine the correct setting, run the drive at the lowest frequency required by the application and increase boost levels
to provide both required torque and smooth operation whilst avoiding excessive current levels which may cause nuisance tripping.
P7-15
Torque Boost Frequency Limit
0.0
50.0
0.0
%
Frequency range for applied boost current (P7-14) as a % of motor rated frequency (P1-09). This sets the frequency cut-off point above
which boost current is no longer applied to the motor.
P7-18
Over Modulation Enable
0
1
0
-
0: Disabled
1 : Enabled. When enabled, over modulation provides a small increase in the available output voltage from the drive, which can assist
in applications where the supply voltage is too low to provide the required motor voltage, resulting in an increased motor current.
P7-19
BLDC Light Load Optimisation
0
1
0
-
0: Disabled
1 : Enabled. When enabled and the drive is set in BLDC Mode (P4-01 = 4), the drive will reduce the output voltage during loght load
operation in order to improve motor efficiency and performance. This setting has no effect when the motor is significantly loaded.
