Rockwell Automation Publication 520-UM001I-EN-E - July 2016 85
Programming and Parameters Chapter 3
Basic Program Group (continued)
P040 [Autotune] Related Parameter(s): P034, P039, A496, A497
Stop drive before changing this parameter.
Enables a static (not spinning) or dynamic (motor spinning) autotune to automatically set the motor parameters. Set the parameter value to a one or two, then issue a valid “Start”
command to begin the routine. After the routine is complete the parameter resets to a zero. A failure (such as if a motor is not connected) results in an Autotune Fault.
It is recommended to perform a full rotate tune when using VVC mode.
Options 0 “Ready/Idle” (Default)
1 “Static Tune” A temporary command that initiates a non-rotational motor stator resistance test for the best possible automatic setting of A496
[IR Voltage Drop]. A start command is required following initiation of this setting. The parameter returns to 0 “Ready/Idle”
following the test, at which time another start transition is required operate the drive in normal mode. Used when motor cannot
be uncoupled from the load.
2 “Rotate Tune” A temporary command that initiates a “Static Tune” followed by a rotational test for the best possible automatic setting of A497
[Flux Current Ref]. A start command is required following initiation of this setting. The parameter returns to 0 “Ready/Idle”
following the test, at which time another start transition is required to operate the drive in normal mode. Important: Used when
motor is uncoupled from the load. Results may not be valid if a load is coupled to the motor during this procedure.
All motor parameters in the Basic Program group must be set before running the routine. If a start command is not given (or a stop command is given) within
30 s, the parameter automatically returns to a zero and an Autotune Fault occurs.
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.
P041 [Accel Time 1] Related Parameter(s): P044, A439
Sets the time for the drive to accelerate from 0 Hz to P044 [Maximum Freq].
Accel Rate = [Maximum Freq] / [Accel Time x]
Values Default: 10.00 s
Min/Max: 0.00/600.00 s
Display: 0.01 s
Speed
0
Time
[Maximum Freq]
[Accel Time x]
[Decel Time x]
0
Acceleration
Deceleration
P042 [Decel Time 1] Related Parameter(s): P044, A439
Sets the time for the drive to decelerate from P044 [Maximum Freq] to 0 Hz.
Decel Rate = [Maximum Freq] / Decel Time x]
Values Default: 10.00 s
Min/Max: 0.00/600.00 s
Display: 0.01 s
Speed
0
Time
[Maximum Freq]
[Accel Time x]
[Decel Time x]
0
Acceleration
Deceleration
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