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4.2.4 P codes (Motor 1 Parameters)
The EQ7 drives the motor under V/f control, dynamic torque control, vector control without speed sensor, or vector
control with speed sensor, which can be selected with function codes.
To use the integrated automatic control functions such as auto torque boost, torque calculation monitoring,
auto-energy saving operation, torque limiter, automatic deceleration (anti-regenerative control), auto search for
idling motor speed, slip compensation, torque vector control, droop control, and overload stop, it is necessary to
build a motor model in the inverter by specifying proper motor parameters including the motor capacity and rated
current.
The EQ7 provides built-in motor parameters for HP matched motors. To use these motors, it is sufficient to specify
motor parameters for P99 (Motor 1 Selection). If the cabling between the inverter and the motor is long (generally,
66 ft (20 m) or longer) or a reactor is inserted between the motor and the inverter, however, the apparent motor
parameters will change, so auto-tuning or other adjustments are necessary. For the auto-tuning procedure, refer
to Chapter 3 "RUNNING THE MOTOR."
When using a motor made by other manufacturers or a non-standard motor, obtain the datasheet of the motor and
specify the motor parameters manually or perform auto-tuning.
To specify the motor parameters correctly, select the motor type with P99 (Motor 1 Selection), specify the motor
rated capacity with P02, and then initialize the motor parameters with H03. This procedure also applies when the
inverter is switched to the MD/HD mode and a motor with one or two ranks lower capacity is used. When switching
the motor between the 1st to 4th motors, specify the corresponding function codes. (Refer to the description of
A42.)
The motor parameters to be specified in P13 through P56 (such as iron loss factors and magnetic saturation
factors) are usually not shown on the motor nameplate or in the test report.
If auto-tuning (P04 = 2 or 3) is not performed, it is not necessary to change the motor parameters from the ones for
a standard motor.
P01
Motor 1 (No. of poles)
P01 specifies the number of poles of the motor. Enter the value given on the nameplate of the motor. This setting
is used to monitor the motor speed (see E43) and control the speed. The following expression is used for the
conversion.
Motor speed (r/min) =
120
Frequency (Hz)
No. of poles
- Data setting range: 2 to 22 (poles)
P02
Motor 1 (Rated capacity)
P02 specifies the rated capacity of the motor. Enter the rated value given on the nameplate of the motor.
Data for P02
Unit
Function
0.01 to 1000
HP
When P99 (Motor 1 Selection) = 1
kW
When P99 (Motor 1 Selection) = 0, 2, 3 or 4
When accessing function code P02 with the keypad, take into account that the P02 data automatically updates the
data of function codes P03, P06 through P23, P53 through P56, and H46.
P03
Motor 1 (Rated current)
P03 specifies the rated current of the motor. Enter the rated value given on the nameplate of the motor.
- Data setting range:
0.00 to 2000 (A)
