5-95
Gain
To input bipolar analog voltage (0 to ±10 VDC) to terminals [12] and [V2], set C35 and C45 data to "0."
Setting C35 and C45 data to "1" enables the voltage range from 0 to +10 VDC and interprets the negative
polarity input from 0 to -10 VDC as 0 V.
C50 Bias (Frequency command 1) (Bias base point) (Refer to F01.)
C51, C52 Bias (PID command 1) (Bias value and Bias base point)
These function codes (and the gain-related function codes) specify the gain and bias of the analog PID command 1,
enabling it to define arbitrary relationship between the analog input and PID commands.
The actual setting is the same as that of F18. For details, refer to F18 given in the description of F01.
Gain-related function codes C32, C34, C37, C39, C42, and C44 are shared by frequency commands.
Bias value (C51) Data setting range: -100.00 to 100.00 (%)
Bias base point (C52) Data setting range: 0.00 to 100.00 (%)
C53 Selection of Normal/Inverse Operation (Frequency command 1) (Refer to E01 to E07.)
5.2.4 P codes (Motor 1 Parameters)
The FRENIC-MEGA drives the motor under V/f control, dynamic torque vector control, V/f control with speed sensor,
dynamic torque vector control with speed sensor, 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 FRENIC-MEGA provides built-in motor parameters for Fuji standard motors 8-series, 6-series, and Fuji motors
exclusively designed for vector control. To use these Fuji motors, it is enough to specify motor parameters for P99
(Motor 1 Selection). If the cabling between the inverter and the motor is long (generally, 20 m or longer) or a reactor is
inserted between the motor and the inverter, however, the apparent motor parameters are different from the actual ones,
so auto-tuning or other adjustments are necessary. For the auto-tuning procedure, refer to Chapter 4 "RUNNING THE
MOTOR."
When using a motor made by other manufacturers or a Fuji 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/LD mode and a motor with one rank higher 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 display the motor speed on the LED monitor and to control the speed (refer to E43). The following expression is
used for the conversion.
120
Motor speed (r/min) =
No. of poles
× Frequency (Hz)
- Data setting range: 2 to 22 (poles)
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