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Common specifications
7.2 Common specifications
Control specifications
Control method
High carrier frequency PWM control (V/F control)/Optimum excitation control/Simple magnetic
flux vector control
Output frequency range 0.5 to 400Hz
Frequency
setting
resolution
Analog input
0.015Hz/60Hz (terminal 2, 4: 0 to 10V/12bit)
0.03Hz/60Hz (terminal 2, 4: 0 to 5V/11bit, 0 to 20mA/11bit, terminal 1: 0 to ±10V/12bit)
0.06Hz/60Hz (terminal 1: 0 to ±5V/11bit)
Digital input 0.01Hz
Frequency
accuracy
Analog input Within ±0.2% of the max. output frequency (25°C ± 10°C (77°F ± 50°F))
Digital input Within 0.01% of the set output frequency
Speed control range 1:10 under V/F control, 1:15 under Simple magnetic flux vector control
Voltage/frequency
characteristics
0 to 400Hz of the base frequency can be set from constant-torque/adjustable 5 points V/F can
be selected.
Starting torque 120% (at 3Hz) when Simple magnetic flux vector control and slip compensation are set
Acceleration/deceleration time
setting
0 to 3600s (acceleration and deceleration can be set individually), linear or S-pattern
acceleration/deceleration modes are available.
DC injection brake
Operation frequency (0 to 120Hz), operation time (0 to 10s), operation voltage (0 to 30%) can
be changed
Stall prevention operation level
Operation current level can be set (0 to 150% variable), whether to use the function or not can
be set.
Operation specifications
Frequency
setting signal
Analog input
Terminal 2, 4: 0 to 10V, 0 to 5V, 4 to 20mA are available.
Terminal 1: -10 to +10V, -5 to 5V are available.
Digital input
Four-digit BCD or16-bit binary using the setting dial of the operation panel or parameter unit
(when used with the option FR-A7AX)
Start signal
Forward and reverse rotation or start signal automatic self-holding input (3-wire input) can be
selected.
Input signals (twelve terminals)
The following signals can be assigned to Pr. 178 to Pr.189 (input terminal function selection): multi
speed selection, second function selection, terminal 4 input selection, JOG operation selection,
selection of automatic restart after instantaneous power failure, external thermal relay input,
HC connection (inverter operation enable signal), HC connection (instantaneous power failure
detection), PU operation/external interlock signal, External DC injection brake operation start,
PID control enable terminal, PU operation, external operation switchover, output stop, start
self-holding selection, forward rotation command, reverse rotation command, inverter reset,
PTC thermistor input, PID forward reverse operation switchover, PU-NET operation
switchover, External-NET operation switchover, command source switchover, DC feeding
operation permission, DC feeding cancel, and PID integral value reset, Pre-charge end
command, Second pre-charge end command, Fault clear signal, Sequence start
Operational functions
Maximum and minimum frequency settings, frequency jump operation, external thermal relay
input selection, polarity reversible operation, automatic restart after instantaneous power
failure operation, original operation continuation at an instantaneous power failure, electronic
bypass operation, forward/reverse rotation prevention, operation mode selection, external DC
injection braking start, PID control, computer link operation (RS-485).
Output signal
Open collector output (five
terminals)
Relay output (two terminals)
The following signals can be assigned to Pr.190 to Pr.196 (output terminal function selection):
inverter running, up-to-speed, instantaneous power failure /undervoltage, overload warning,
output frequency detection, second output frequency detection, regenerative brake prealarm
*4,
electronic thermal relay function pre-alarm, PU operation mode, inverter operation ready,
output current detection, zero current detection, PID lower limit, PID upper limit, PID forward
rotation reverse rotation output, bypass operation-inverter switchover MC1 to MC3,
commercial power supply side motor 1 to 4 connection, inverter side motor 1 to 4 connection,
fan alarm output, heatsink overheat pre-alarm, inverter running start command on,
deceleration at an instantaneous power failure, PID control activated, PID deviation limit,
during retry, During power failure, During PID output suspension, During pre-charge operation,
During second pre-charge operation, Pre-charge time over, Second pre-charge time over, Pre-
charge level over, Second pre-charge level over, pulse train output of output power, DC current
feeding, life alarm, fault output 3 (power-off signal), power savings average value update
timing, current average monitor, fault output 2, maintenance timer alarm, remote output, alarm
output, and fault output.
Operating status
When used with
the FR-A7AY,
FR-A7AR
(option)
In addition to above, the following signal can be assigned to Pr.313 to Pr. 319 (extension output
terminal function selection): control circuit capacitor life, main circuit capacitor life, cooling fan life
and inrush current limit circuit fault. (Only positive logic can be set for extension terminals of
the FR-A7AR.)
For meter
Analog output
(Max. 10VDC: one
terminal)
(Max. 20mADC: one
terminal)
The following signals can be assigned to Pr.54 CA terminal function selection and Pr. 158 AM
terminal function selection: output frequency, motor current (steady or peak value), output
voltage, frequency setting value, running speed, converter output voltage (steady or peak
value), electronic thermal relay function load factor, input power, output power, load meter,
reference voltage output, motor load factor, power saving effect, regenerative brake duty
*4, PID
set value, and PID measured value.