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About New Functions
Added or Improved Functions for the 3G3RV-V1 Inverter
Added Functions with Flux Vector Control
If a PG speed control board is used, the drive will have a high degree of accuracy, and the following functions
are available.
Torque Control
•
Controls the motor's output torque with a torque reference from an analog input terminal.
Multi-function contact input terminals can be used to switch between speed and torque control while the
motor is running.
Droop Control
•
Allows the user to set the amount of allowable motor slip.
Can be used to smooth motor torque or balance loads among Inverters.
Zero-servo Function
•
Holds the motor when the motor is stopped in what is call a zero-servo status.
Can be used to stop the motor even with an external force acts on the motor or the analog reference input is
offset.
Feed Forward Function
•
Improves speed control accuracy with flux vector control.
Effective for machines in which the ASR gain cannot be increased to a large value because doing so would
result in vibrations.
Has an additional effect of making the system less prone to overshoot.
Added Input/Output Points for Interface
The following input/output points have been added for the 3G3RV-V1 Inverter, and various controls are avail-
able.
Sequence input terminals: 8 points (3G3RV Inverter: 7 points)
•
3G3RV-V1: Photocoupler (+24 VDC 8 mA) × 8 points
3G3RV: Photocoupler (+24 VDC 8 mA) × 7 points
Multi-function analog input terminals: 3 points (3G3RV Inverter: 2 points)
•
For the 3G3RV-V1 Inverter, three points can be selected from the following input terminals.
Input Terminal
-10 to 10 V (11 bits + signal)
4 to 20 mA (10 bits)
-15 V speed setting power supply
•
-15 V speed setting power supply has been added in addition to +15V speed setting power supply.
Input Boards (Optional): 3G3IV-PAI14U, 3G3IV-PAI14B, 3G3IV-PDI08, and 3G3IV-PDI16H2
•
(Only the option boards for communications are available for the 3G3RV Inverter)
The 3G3IV-PAI14U and 3G3IV-PAI14B option boards allow the user to use analog speed reference with
high accuracy and resolution. The 3G3IV-PDI08 and 3G3IV-PDI16H2 option boards allow the user to use
digital speed references.
-4
1
3G3RV-V1 (3 points)
Number of
Terminals
2
1
3G3RV (2 points)
Input Terminal
0 to 10 V (10 bits)
4 to 20 mA (9 bits)
Number of
Terminals
2
1
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Troubleshooting
