Rockwell Automation Publication 750-PM001N-EN-P - February 2017 57
Drive Port 0 Parameters Chapter 3
File
Group
No. Display Name
Full Name
Description
Values
Read-Write
Data Type
MOTOR CONTROL
Autotune
70 Autotune
Autotune
Provides a manual or automatic method for setting P73 [IR Voltage Drop], P74 [Ixo
Voltage Drop] and P75 [Flux Current Ref]. Valid only when parameter P35 [Motor Ctrl
Mode] is set to 1 “Induction SV”, 2 “Induct Econ”, or 3 “Induction FV.”
Ready (0) – Parameter returns to this setting following a “Static Tune” or “Rotate Tune”,
at which time another start transition is required to operate the drive in normal mode. It
also permits manually setting P73 [IR Voltage Drop], P74 [Ixo Voltage Drop] and P75
[Flux Current Ref].
Calculate (1) – Uses motor nameplate data to automatically set P73 [IR Voltage Drop],
P74 [Ixo Voltage Drop], P75 [Flux Current Ref] and P621 [Slip RPM at FLA].
Static Tune (2) – A temporary command that initiates a non-rotational motor stator
resistance test for the best possible automatic setting of P73 [IR Voltage Drop] in all valid
modes and a non-rotational motor leakage inductance test for the best possible
automatic setting of P74 [Ixo Voltage Drop] in a Flux Vector (FV) mode. A start command
is required following initiation of this setting. Used when motor cannot be rotated.
Rotate Tune (3) – A temporary command that initiates a “Static Tune” followed by a
rotational test for the best possible automatic setting of P75 [Flux Current Ref]. In Flux
Vector (FV) mode, with encoder feedback, a test for the best possible automatic setting
of P621 [Slip RPM at FLA] is also run. A start command is required following initiation of
this setting. Important: If using rotate tune for a Sensorless Vector (SV) mode, the
motor should be uncoupled from the load or results may not be valid. With a Flux Vector
(FV) mode, either a coupled or uncoupled load will produce valid results.
Inertia Tune (4) – A temporary command that initiates an inertia test of the motor/load
combination. The motor will ramp up and down while the drive measures the amount of
inertia. This option only applies to FV modes selected in P35 [Motor Ctrl Mode]. Final
test results should be obtained with load coupled to the motor.
Default:
Options:
1 – Calculate
0 – Ready
1 – Calculate
2 – Static Tune
3 – Rotate Tune
4 – Inertia Tune
RW 32-bit
Integer
71 Autotune Torque
Autotune Torque
The motor torque applied to the motor during the flux current and inertia tests.
Units:
Default:
Min/Max:
%
50.00
0.00 / 200.00
RW Real
73 IR Voltage Drop
IR Voltage Drop
Value of voltage drop across the resistance of the motor stator at rated motor current.
Used only when P35 [Motor Ctrl Mode] is set to 1 “Induction SV”, 2 “Induct Econ”, or 3
“Induction FV.” This parameter cannot be changed unless P70 [Autotune] is set to 0
“Ready.”
Units:
Default:
Min/Max:
Volt
Based on Drive Rating
0.00 / Based on Drive Rating and Voltage
Class
RW Real
74 Ixo Voltage Drop
Ixo Voltage Drop
Value of voltage drop across the leakage inductance of the motor at rated motor current.
Used only when P35 [Motor Ctrl Mode] is set to 3 “Induction FV.” This parameter cannot
be changed unless P70 [Autotune] is set to 0 “Ready.”
Units:
Default:
Min/Max:
V AC
Based on Drive Rating and Voltage Class
0.00 / P25 [Motor NP Volts]
RW Real
75 Flux Current Ref
Flux Current Reference
Value of amps for full motor flux. This parameter cannot be changed unless P70
[Autotune] is set to 0 “Ready.”
Units:
Default:
Min/Max:
Amps
P21 [Rated Amps] x 0.35
0.00 / P21 [Rated Amps] x 0.995
RW Real
76 Total Inertia
Total Inertia
Time in seconds for a motor coupled to a load to accelerate from zero to base speed at
rated motor torque. Calculated during auto-tune. Only use this parameter when P35
[Motor Ctrl Mode] is set to 3 “Induction FV.”
Units:
Default:
Min/Max:
Secs
2.00
0.01 / 600.00
RW Real
ATTENTION : Rotation of the motor in an undesired direction
can occur during this procedure. To guard against possible
injury and/or equipment damage, it is recommended that the
motor be disconnected from the load before proceeding.
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