Toshiba Tosvert VF-A5 - Manual (Page 97)

General specifications
Control method Sinusoidal PWM control
Output voltage regulation
Man circuit voltage feedback control. (Automatic regulation, “fixed* and “control off“
selections possible)
Output frequency range
0.01 to 400Hz, set to 0.01 to 80Hz by default, max. frequency adjustable from 30 to 400Hz:
Note 2)
Frequency setting resolution
0.01Hz: operation panel input (60Hz base), 0.1Hz: analog input (60Hz base, 12-bit/Oto
lOVdc) 0.01Hz: communication input (50Hz base)
Frequency precision
♦0.2% of the max. output frequency (25°C±10°C): analog input, ±0.01 (25°C±10°C):
digital input
Voltage/frequency characteristics
Constant V/f, variable torque, automatic torque boost, voltage vector control and automatic
energy-saving control/maximum voltage frequency adjustment (25 to 400Hz), torque boost
adjustment (0 to 30Hz), start-up frequency adjustment (0 to 10Hz), end frequency
adjustment (0 to 30Hz)
Frequency setting signals
3kii potentiometer (1 to lOKil potentiometer connection aiso possible)
0 to lOVdc (Input impedance 23n: 33kil), 0 to ±10Vdc (23n: STkil), 0 to ±5Vdc (2n: 34kil)
4 to 20mA (Zin: soon)
Terminal block reference frequency
inputs 2 sources can be set from a total of five types, including analog input (RR, IV, RX), pulse
input and binary input.
Frequency jump Can be set in three places, jump frequency and band setting
Upper/Io\wer limit frequencies
Upper limit frequency: 0 to max. frequency,
Ljower limit frequency: 0 to upper limit frequency
PWM carrier frequency selection Adjustable between 3 and 17kHz (18.5kW to 75kW adjustable between 3 and 15kHz)
PID control Proportional gain, integral gain, anti-hunting gain, lag-time constant adjustments
Acceleration/deceieration times
0.1 to 6000 sec., acceleration/deceieration times #1 and #2 selection,
acceleration/deceieration pattern selection
DC injection braking
Braking starting frequency adjustment (0 to 120Hz), braking current adjustment (0 to 100%),
braking time adjustment (0 to 10 sec.), emergency stop braking function, motor shaft
stationary control function
Fonvard/reverse run
Forward run when F-CC “closed“, reverse run when R-CC “closed“, reverse run when both
“closed“, coast-stop when ST-CC “opened“. Emergency stop from panel or terminal block.
Jog run
Jog run from panel with JOG mode selection. Terminal block operation possibie with
parameter settings.
Preset speed operation: Note 6)
Set frequency + 15 preset speeds possible with open/closed combinations of SSI, SS2,
SS3, SS4 and CC.
Retry
When a protective function activates, after main circuit devices are checked, running
restarts. Settable to a max. of 10 times. Wait time adjustment (0 to 10 sec.).
Soft stall Automatic load reduction control during overload. (Default setting: OFF)
Cooling fan ON/OFF Fan is automatically stopped when not necessary to ensure extended lifetime.
Panel key operation ON/OFF control
Prohibit functions such as reset only or monitor only, etc., can be selected. All key
operations can also be prohibited. A cancel protection function using a password (number)
is also built-in.
Regeneration power ride-through
control
Operation is continued even during momenteiry power failure using regenerative energy
from the motor. (Default setting: OFF)
Auto-restart A coasting motor can be smoothly restarted. (Default setting: OFF)
Simple pattern run
4 groups of 8 patterns each can be set to the 15 preset speed values. A max. of 32 different
patterns can be run. Terminai biock control/repetitive run possible.
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