Toshiba TOSVERT VF-A7 Manual
The light-load high-speed operation
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- Instruction manual (255 pages) ,
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- Instruction manual (2 pages)
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Instruction Manual
E6581172①
TOSVERT VF-A7/P7
The light-load high-speed operation Manual
This manual is intended only to describe the typical operation and application of the
product. The technical information contained in this manual does not guarantee the
intellectual proprietary rights or other rights of, or grant a license to, the Toshiba
Schneider Inverter Corporation or third parties, for the use of the technical information or
of the product.
© Toshiba Schneider Inverter Corporation 2003
All rights reserved.
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Summary of Contents for Toshiba TOSVERT VF-A7
- Page 1 The technical information contained in this manual does not guarantee the intellectual proprietary rights or other rights of, or grant a license to, the Toshiba Schneider Inverter Corporation or third parties, for the use of the technical information or of the product.
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Page 2: Related Parameter
E6581172① 1. Introduction Thank you for purchasing the Toshiba industrial inverter “TOSVERT VF-A7/P7”. This manual functionally describes the light-load high-speed operation of our "TOSVERT VF-A7/P7" for industrial use. 2. Function This parameter provides a function of more raising the speed of motor during light load to improve the operating efficiency of machine. - Page 3 E6581172① Contact input terminal function Contact output terminal function (related with light-load high-speed operation) (related with light-load high-speed operation) Parameter setting value Parameter setting value Function Function Positive logic Negative logic Positive logic Negative logic S1 preset-speed command Light-load output S2 preset-speed command Heavy load output S3 preset-speed command...
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Page 4: Operation
E6581172① 4. Operation Typical examples of light-load high-speed operation are first described. The following figure is a timing chart in case of using the automatic mode of light-load high-speed operation (F330=2): Example: Automatic mode of light-load high-speed operation (F330=2): Forward run Light-load high-speed operation Frequency (Hz) Automatic light-load... -
Page 5: Mode Description
E6581172① 4.1. Mode description In case of using the light-load high-speed operation function, the light-load high-speed operation mode shall be determined at first. There are five kinds of modes, to be selected with F330 (light-load high-speed operation selection). Select the desired mode according to the following flowchart: F330 setting and function Operation mode Detection... - Page 6 E6581172① 4.1.1. Description of F330=1 or 6 (user interface) operation Light-load high-speed operation can be performed by returning the light-load detection signal to the input terminal as preset-speed data when light-load high-speed operation selection F330=1 or 6 (user interface) is set. However, in case of user interface, because of frequency during light-load high-speed operation being the input frequency, high-speed operation will not be stopped even if the directed speed value is set to the switching frequency or less.
- Page 7 E6581172① In case of selecting the light-load detection signal (106) for OUT1 (F130) OUT1 Frequency (Hz) Preset-speed operation of 8~15 F287〜294 Preset-speed operation of 1~7 Light-load high-speed operation switching lower limit Time frequency F331 (seconds) Operation signal (F) Light load Heavy load Load condition Light-load detection...
- Page 8 E6581172① 4.1.2. Operation with F330=2, 4, 7 or 9 (automatic mode) It is a mode of light-load high-speed operation with automatic light-load high-speed operation frequency (F341) when light-load high-speed operation selection F330=2, 4, 7 or 9 (automatic mode) is set. F330=2 or 7 : Continuous automatic mode F330=4 or 9 : Enabled-terminal effective automatic mode F330=4 or 9 is the setting of 2 or 7 plus the enabling signal of light-load high-speed operation function.
- Page 9 E6581172① 4.1.3. Operation with F330=3, 5, 8 or 10 (preset-speed mode) When light-load high-speed operation selection F330=3, 5, 8 or 10 (preset-speed mode) is set, a light-load detection internally turns ON the preset-speed command 4. Therefore, during light-load detection, operation shall be performed with the preset-speed frequencies of 8~15.
- Page 10 E6581172① Frequency (Hz) F102 achieved speed detection width Preset-speed operation of 8~15 F287〜294 F102 achieved speed detection width Preset-speed operation of 1~7 Light-load high-speed operation switching lower limit frequencyF331 Time (seconds) Operation signal (F) Light-load high-speed operation enabling signal (S4) Heavy load Light load Load condition...
- Page 11 E6581172① 4.2. Input/output terminal function This section describes the functions as shown on the following table, which are not detailed in the instruction manual of inverter unit among input/output terminal functions related with light-load high-speed operation. Contact input terminal function Contact output terminal function (related with light-load high-speed operation) (related with light-load high-speed operation)
- Page 12 E6581172① 4.3. Light-load detection mode When F342 (Light-load detection mode) is used, the sign of the positive and negative can be judged for F335~F340. F342 is set as follows. 1) Set “+128" for the detection with the sign. 2) Set “+0" when it is rolling up of the forward rotation. When it is small compared with the detection level, it is judged a light load.
- Page 13 E6581172① 4.4. Detailed description of light-load high-speed operation Relation between parameters of F331~F341 and light-load high-speed operation is described here. Timing chart as shown in the next page indicates an example of forward run in automatic light-load high-speed mode (F330=2). Based on this example, the operation is detailed.
- Page 14 E6581172① Example: Automatic light-load high-speed operation mode (F330=2): Forward run Light-load high-speed Light-load high-speed operation operation Frequency (Hz) Automatic light-load high-speed operation F102 achieved speed frequency F341 detection width Directed speed value F102 achieved speed Light-load high-speed detection width operation switching lower limit frequency F331 F332...