Omron RX Series - Page 280

6 Vector Control
6 - 12
High-function General-purpose Inverter 3G3RX-V1 User’s Manual (I578-E1)
Precautions for Correct UsePrecautions for Correct Use
Under sensorless vector control, 0-Hz sensorless vector control, or sensor vector control,
because of its control characteristics, the inverter may output a rotation signal opposite to the
RUN command direction at low speeds. If allowing the motors to rotate in the opposite rotation
may pose a risk of mechanical damage or any other problem, set the Reverse Rotation
Prevention Selection (b046) to 01 (Enabled). (Refer to Reverse Rotation Prevention Function on
page 7-83).
Parameter
No.
Function name Data Default data Unit
A044/A244 1st/2nd Control Method
00: Constant torque characteristics (VC)
01: Reduced torque characteristics
*1
02: Free V/f setting
*2
03: Sensorless vector control
*2
04: 0-Hz sensorless vector control
*2
05: Sensor vector control (V2)
*2
*1. VP 1.7th Power (VC at low speed).
*2. Although the 1st Control Method (A044) can be set to any of 00 to 05, the 2nd Control Method (A244) can be
set to 00 to 04 and the 3rd Control Method (A344) can be set to 00 to 01 only. In the light load mode, this
parameter cannot be set to 04 or 05.
00 –
H002/H202
1st/2nd Motor Parameter
selection
00: Standard motor parameter
01: Auto-tuning
02: Auto-tuning (Online auto-tuning
enabled)
00 –
H003/H203 1st/2nd Motor Capacity
0.2/0.4/0.55/0.75/1.1/1.5/2.2/3.0/3.7/4.0/
5.5/7.5/11.0/15.0/18.5/22/30/37/45/55/
75/90/110/132
Maximum
applicable
motor capacity
kW
H004/H204
1st/2nd Motor Pole
Number
2/4/6/8/10 4 pole
H020/H220
1st/2nd Motor Parameter
R1 (Winding resistance on
primary side)
0.001 to 9.999
10.00 to 65.53
Dependent on
motor capacity
Ω
H021/H221
1st/2nd Motor Parameter
R2 (Winding resistance on
secondary side)
H022/H222
1st/2nd Motor Parameter
L (Leakage inductance)
0.01 to 99.99
100.0 to 655.3
mH
H023/H223
1st/2nd Motor Parameter
Io (No-load current)
0.01 to 99.99
100.0 to 655.3
A
H024/H224
1st/2nd Motor Parameter J
(Moment of inertia)
0.001 to 9.999
*3
10.00 to 99.99
100.0 to 999.9
1000. to 9999.
*3. For the Moment of Inertia J, set the motor conversion value. The larger the J value, the higher the response
speed, which results in a steep torque rise; the smaller the J value, the lower the response speed, which
results in gradual torque rise. After setting the J value, adjust the response speed in the 1st/2nd Speed
Response (H005/H205).
kg/m
2