Fuji Electric FRENIC MEGA G2 Series - Page 853

11.22 Built-in Option Card Types and Ports in Which They Can be Installed
11-125
SELECTING PERIPHERAL EQUIPMENT
Chap 11
Control method
Speed control (vector control with speed sensor, V/f control with speed sensor, dynamic torque vector control with
speed sensor)
The motor speed is detected with a feedback signal from the motor PG (pulse generator). This control makes it
possible to achieve speed control with responsiveness.
(The use of a dedicated Fuji motor for vector control (VG motor) is recommended for the motor when performing
vector control.)
Table 11.22-45
Item
Specification
Remarks
Control
specifications *1
Maximum
output
frequency
5 to 599 Hz (encoder upper limit pulse: 30 kHz/100
kHz *2)
When using VG
motor (1024 P/R)
Speed control
range
Under vector control with speed sensor
Minimum speed: base speed (1:1500)
(in the case of 4P motor: 1 to 1500 min
-1
)
Under V/f control with speed sensor, dynamic
torque vector control with speed sensor
Minimum speed: base speed (1:100)
(in the case of 4P motor: 15 to 1500 min
-1
)
Speed control
accuracy
Rated rotation speed ±0.2% (25 ºC ±10 ºC)
*1 The control performance changes significantly depending on the pulse count. A pulse count of 1024 P/R or
higher is recommended.
*2 30 kHz: open collector type, 100 kHz: complementary type
Pulse train input
Pulse train input is a function used to give inverter frequency commands with a pulse train. Pulse train sign/pulse
train input, forward rotation pulse/reverse rotation pulse, and AB-phase 90° phase difference pulse train input are
possible. Use terminal [XA] and terminal [XB] for pulse train input.
Table 11.22-46
Pulse train format
Operation overview
Pulse train sign / Pulse train
input
Terminal [XB] frequency/speed command according to the pulse train
rate is given to the inverter. Furthermore, the speed command polarity
can be set with terminal [XA] ON/OFF input *1.
Forward rotation pulse /
Reverse rotation pulse
If there is terminal [XB] pulse train input, a positive polarity speed
command based on the frequency is given to the inverter.
If there is terminal [XA] pulse train input, a reverse polarity speed
command based on the frequency is given to the inverter. *1
A, B phase 90° phase
difference
Speed commands with polarity are given to the inverter unit from the
phase difference and frequency from two types of pulse signal with
terminal [XA] and terminal [XB] 90° phase difference. *1
*1 The rotation direction of the motor is determined by the polarity of the pulse train input and the inverter unit
“FWD”/”REV” commands.