7 Detailed Functions
7 - 84
High-function General-purpose Inverter 3G3RX-V1 User’s Manual (I578-E1)
The characteristics in the heavy load mode and the light load mode are as shown below.
Changing the Heavy Load/Light Load Selection (b049) setting switches the setting ranges and default
datas of some parameters.
Doing so also causes some parameter settings to be initialized at the same time.
For these parameters, you need to set data again after changing the b049 setting even if you configured
them beforehand.
• Changing from heavy load mode to light load mode:
Basically causes the parameter settings to be initialized. For details, refer to the Initialization at mode
switching column in the following table.
• Changing from light load mode to heavy load mode:
Basically does NOT cause the parameter settings to be initialized. For details, refer to the
Initialization at mode switching column in the following table.
Item Heavy load (CT) Light load (VT)
Feature
Loads that require a high torque during
startup, acceleration/deceleration etc.
Loads that do not require frequent use
of the inverter above rated torque
Application Elevator, crane, conveyor, etc. Fan, pump, air conditioner, etc.
Rated current (Example) 3.0 A (3-phase 200 V, 0.4-kW Inverter) 3.7 A (3-phase 200 V, 0.4-kW Inverter)
Overload current rating 150%, 60 s 120%, 60 s
No.
Parameter
name
Setting range Default data
Initialization at
mode switching
Heavy load (CT) Light load (VT)
Heavy
load (CT)
Light load
(VT)
Heavy to
Light
Light to
Heavy
A044
1st Control
Method
00: Constant torque
characteristics
01: Reduced torque
characteristics
02: Free V/f setting
03: Sensorless vector
control
04: 0-Hz sensorless vector
control
05: Sensor vector control
00: Constant torque
characteristics
01: Reduced torque
characteristics
02: Free V/f setting
03: Sensorless vector
control
00
No
switching
Enabled Disabled
A244
2nd Control
Method
00: Constant torque
characteristics
01: Reduced torque
characteristics
02: Free V/f setting
03: Sensorless vector
control
04: 0-Hz sensorless vector
control
00: Constant torque
characteristics
01: Reduced torque
characteristics
02: Free V/f setting
03: Sensorless vector
control
00
No
switching
A054
DC Injection
Braking Power
Percentage of heavy-load
rated current
0. to 100. [%] (0. to 80. [%])
Percentage of light-load
rated current
0. to 70. [%] (0. to 50. [%])
50. [%]
(40. [%])
No
switching
Enabled Disabled
A057
Startup DC
Injection
Braking Power
0. [%]
No
switching
A059
DC Injection
Braking Carrier
Frequency
0.5 to 15.0 [kHz]
(0.5 to 10.0 [kHz])
0.5 to 12.0 [kHz]
(0.5 to 8.0 [kHz])
5.0 [kHz]
(3.0 [kHz])
3.0 [kHz]
(3.0 [kHz])
Enabled Disabled
A085
Operation
Mode
Selection
00: Normal operation
01: Energy-saving
operation
02: Automatic operation
00: Normal operation
01: Energy-saving
operation
00
No
switching
Enabled Disabled
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