Toshiba VF-AS3 User Manual
Torque Control Instruction Manual
E6582106
Note
1. Read this manual carefully before using the inverter. After reading, the user should
keep this manual at hand to use it for maintenance and inspection in the future.
2. Please be informed that the contents of this document may be changed without notice.
1. Torque control function
Inverter
M
Speed command
■ Function
VF-AS3 has speed control that controls the rotation of a motor and torque control that controls a power necessary for
constant tension control such as winding control.
Torque control can be used with a motor speed sensor or without it. For a machine requiring torque accuracy, use the
control with sensor.
Note 1) For torque control with sensor, an encoder feedback option "VEC008Z" is required.
■ Difference from speed control
1. What is speed control
Inverter control generally uses speed control.
It gives an inverter a command of a desired rotational speed so that the inverter can control the motor to rotate at
the speed as commanded. Therefore, the speed becomes constant regardless of the size of load.
Main application
Group Examples
Wind/water power
machines and
compress
machine
Distribution,
conveyance, and
transport
machines
Construction
machines related
Textile machine
Food processing
machine
Packing machine
Wood processing
machine
Metal handicraft
machine
Metal processing
machine
Paper making and
printing machine
Automatic service
devices
Environment and
life-related
machine
Fan, blower, pump, air-conditioning
system, clean room, dryer, and
compressor
Crane, hoist, conveyor, 3-dimensional
automatic warehouse, and 3-dimensional
parking
Rock crusher, tunnel boring machine, and
paving machine
Fiber machine, spinning machine, loom,
dyeing machine, and industrial sewing
machine
Blender, slicer, rice/wheat cleaning
machine, bakery equipment, noodle
making machine, tea manufacturing
machine, and commercial oven
Wrapping machine, packing machine, and
bag-filling machine
Woodwork machine, sawing lumbering
machine, and woodwork milling machine,
Lathe, drilling machine, milling machine,
and grinding machine
Wire drawing machine
and winding/rewinding machine
Printing machine, and paperwork machine
Health care tool (running machine and so
on), medical appliance (X-ray equipment
and so on), and stage setting
Business-purpose washing machine, carwash machine, shutter, and dust collector
, press machine,
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1
2. What is torque control
Inverter
M
Torque command
Torque control gives the inverter a command of a torque to be applied to a load machine, and the inverter controls
so that this torque command and the load torque should match. Therefore, the speed is decreased with a larger
load and increased with a smaller load.
■ Parameter setting
Torque control
Main application
Group Examples
Textile machine
Metal processing
machine
Paper making and
printing machine
Automatic service
devices
Fiber machine, spinning machine, and
loom
Wire drawing machine and winding/
rewinding machine
Printing machine and paperwork machine
Stage setting
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Title Parameter name Adjustment range Unit Default setting
0: V/f constant
1: Variable torque
2: Automatic torque boost
3: Vector control 1
4: Energy savings
5: Dynamic energy savings (for fan and pump)
Pt V/f Pattern
F420 Torque command selection
6: PM motor control
7: V/f 5-point setting
8: 9: Vector control 2
10: PG feedback control
11: PG feedback vector control (speed/torque)
12: -
0: 1: Terminal RR
2: Terminal RX
3: Terminal II
4: Terminal AI4 (option)
5 - 11: 12: F725
13 - 19: 20: Embedded Ethernet
21: RS485 communication (connector 1)
22: RS485 communication (connector 2)
23: Communication option
-0
-2
F421 Torque command filter 0 - 1000 ms 0
F423 Tension control torque bias input Same as [F420] - 0
F424 Load sharing gain input Same as [F420] - 0
2
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Title Parameter name Adjustment range Unit Default setting
0: 1: Terminal RR
2: Terminal RX
F425 Fwd speed limit input
F426 Fwd speed limit level 0.0 - UL Hz 50.0/60.0
F427 Rev speed limit input
F428 Rev speed limit level 0.0 - UL Hz 50.0/60.0
F430
Speed limit center value input
select
3: Terminal II
4: Terminal AI4 (option)
5 - 11: 12: F426
0: 1: Terminal RR
2: Terminal RX
3: Terminal II
4: Terminal AI4 (option)
5 - 11: 12: F428
0: 1: Terminal RR
2: Terminal RX
3: Terminal II
4: Terminal AI4 (option)
5 - 11: 12: F431
-0
-0
-0
F431 Speed limit center value 0.0 - FH Hz 0.0
F432 Speed limit band 0.0 - FH Hz 0.0
F435
F441 Power running torque limit level 1
F443 Regenerative torque limit level 1
F444 Power running torque limit level 2
F445 Regenerative torque limit level 2
F446 Power running torque limit level 3
F447 Regenerative torque limit level 3
F448 Power running torque limit level 4
F449 Regenerative torque limit level 4
Rotation direction limit during
torque control
0: Fwd/Rev permit
1: Command direction permit
0.0 - 249.9
250.0: Disabled
0.0 - 249.9
250.0: Disabled
0.0 - 249.9
250.0: Disabled
0.0 - 249.9
250.0: Disabled
0.0 - 249.9
250.0: Disabled
0.0 - 249.9
250.0: Disabled
0.0 - 249.9
250.0: Disabled
0.0 - 249.9
250.0: Disabled
-0
% 250.0
% 250.0
% 250.0
% 250.0
% 250.0
% 250.0
% 250.0
% 250.0
F455 Torque command polarity at Rev
F725 Panel torque command -250 - 250 % 0
F727 Panel tension torque bias -250 - 250 % 0
F728 Panel load sharing gain 0 - 250 % 100
0: Regeneration at positive torque command
1: Power running at positive torque command
-0
3
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Analog input
Title Parameter name Adjustment range Unit Default setting
F201 RR point 1 input value 0 - 100 % 0
F202 RR point 1 frequency 0.0 - 590.0 Hz 0.0
F203 RR point 2 input value 0 - 100 % 100
F204 RR point 2 frequency 0.0 - 590.0 Hz 50.0/60.0
F205 RR point 1 rate 0 - 250 % 0
F206 RR point 2 rate 0 - 250 % 100
F210 RX point 1 input value -100 - 100 % 0
F211 RX point 1 frequency 0.0 - 590.0 Hz 0.0
F212 RX point 2 input value -100 - 100 % 100
F213 RX point 2 frequency 0.0 - 590.0 Hz 50.0/60.0
F214 RX point 1 rate -250 - 250 % 0
F215 RX point 2 rate -250 - 250 % 100
F216 II point 1 input value 0 - 100 % 20
F217 II point 1 frequency 0.0 - 590.0 Hz 0.0
F218 II point 2 input value 0 - 100 % 100
F219 II point 2 frequency 0.0 - 590.0 Hz 50.0/60.0
F220 II point 1 rate 0 - 250 % 0
F221 II point 2 rate 0 - 250 % 100
F222 AI4 point 1 input value -100 - 100 % 0
F223 AI4 point 1 frequency 0.0 - 590.0 Hz 0.0
F224 AI4 point 2 input value -100 - 100 % 100
F225 AI4 point 2 frequency 0.0 - 590.0 Hz 50.0/60.0
F226 AI4 point 1 rate -250 - 250 % 0
F227 AI4 point 2 rate -250 - 250 % 100
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