Mitsubishi Electric FR-E800 Series Instruction Manual page 93

NOTE
• A vector control option (FR-A8AP E kit) needs to be installed to perform Vector control. The FR-A8AP E kit cannot be used
with another plug-in option, as two or more plug-in options cannot be installed to the FR-E800 inverter at the same time. The
following networks are not available when the inverter is under Vector control.
FR-E800
FR-E800-E, FR-E800-SCE
• Vector control requires the following conditions.
When the conditions are not satisfied, malfunctions such as insufficient torque, uneven rotation may occur.
• The rated motor current should be equal to or less than the inverter rated current.
If a motor with substantially low rated current compared with the inverter rated current is used, speed and torque accuracies
may deteriorate due to torque ripples, etc. Set the rated motor current to about 40% or higher of the inverter rated current.
• Torque control is not available for a PM motor.
• The motor described in the following table is used.
Mitsubishi Electric high-performance energy-saving motor with
encoder (SF-PR-SC)
Mitsubishi Electric Vector control dedicated motor (SF-V5RU
(1500 r/min series))
Mitsubishi Electric inverter-driven geared motor for encoder
feedback control (GM-DP)
Mitsubishi Electric standard efficiency motor with encoder (SF-
JR)
Mitsubishi Electric high-efficiency motor with encoder (SF-HR)
Mitsubishi Electric constant-torque motor with encoder (SF-
JRCA 4P, SF-HRCA)
Mitsubishi Electric inverter-driven geared motor for encoder
feedback control (GM-DZ)
Other motors (motors other than SF-V5RU 1500 r/min series,
other manufactures' motors, etc.)
• Single-motor operation (one motor to one inverter) is performed.
• The wiring length from inverter to motor is 30 m or less. (When the wiring length exceeds 30 m, perform offline auto tuning with
the wiring in place.)
• A surge voltage suppression filter (FR-ASF/FR-BMF) is not used.
 PM sensorless vector control
• The inverter enables highly efficient motor control and highly accurate motor speed control of a PM (permanent magnet
embedded) motor, which is more efficient than an induction motor.
• A speed detector such as an encoder is not required as the inverter estimates the motor speed by the calculation from the
inverter output voltage and current. The inverter drives the PM motor with the least required current for a load in order to
achieve the highest motor efficiency.
Inverter
Speed
command
Speed/magnetic
pole position
92
4. Control Method
Model
CC-Link, DeviceNet, PROFIBUS-DP, CC-Link IE TSN, CC-Link IE Field
Network Basic, MODBUS/TCP, EtherNet/IP, BACnet/IP, and PROFINET
CC-Link, DeviceNet, PROFIBUS-DP, Mitsubishi inverter protocol (computer link
communication), MODBUS RTU
Motor
PM sensorless vector control image
Output
voltage
Inverter
Controller
circuit
Magnetic field observer
*1
Virtual motor
Unavailable network
The offline auto tuning is not required.
The offline auto tuning is required.
Output *1 A magnetic field observer is a control
method that calculates the motor
current
speed/magnetic pole position based
on the motor voltage and current of a
virtual motor which is set up in the
drive unit.
Condition