Toshiba Tosvert VF-S15 User Manual

E6582175
F-40
6
6.10.3 Fine adjustment of analog frequency command
f470 : VIA input bias f473 : VIB input gain
f471 : VIA input gain f474 : VIC input bias
f472 : VIB input bias f475 : VIC input gain
 Function
These parameters are used to fine adjust the relation between the frequency command input through
the analog input terminal VIA, VIB, VIC and the output frequency.
Use these parameters to make fine adjustments after making rough adjustments using the
parameters f201 to f204, f210 to f213, f216 to f219
The figure below shows the characteristic of the frequency command input through the VI terminal and that of
the output frequency.
* Bias adjustment of analog input terminal (f470, f472, f474)
Decrease the value in case frequency is output even though the frequency command is 0 (zero) Hz.
* Gain adjustment of analog input terminal (f471, f473, f475)
Increase the value in case the output frequency doesn’t reach the maximum frequency even though the
maximum voltage and current are applied.
Output frequency (Hz)
Maximum frequency
f470
f472
f474
0%
0V
4mA
100%
10Vdc
20mAdc
f471
f473
f475
Large
Small
Large
Small
Frequency setting signal (Analog input value)
0

Toshiba Tosvert VF-S15 Specifications

General

Category	Inverter
Control Method	V/f control, Sensorless vector control
Cooling Method	Forced air cooling
Model	Tosvert VF-S15
Protection Features	Overcurrent, Overvoltage, Undervoltage, Overheat
Communication Options	Modbus RTU
Overload Capacity	150% for 1 minute
Braking Unit	Built-in braking transistor
Output Voltage	3-Phase, same as input voltage
Operating Temperature	-10 to +50°C (14 to 122°F)
Storage Temperature	-20 to 65°C (-4 to 149°F)
Humidity	5 to 95% RH (non-condensing)
Altitude	Up to 1000m above sea level
Input Voltage	3-Phase 200 to 240 VAC, 3-Phase 380 to 480 VAC
Weight	Varies depending on model (e.g., 0.8 kg to 16 kg)