Heavy Load/Light Load Selection - Omron RX Series User Manual

5 Basic Settings
5-2-2

Heavy Load/Light Load Selection

The 3G3RX-V1 Series Inverter supports dual load ratings (heavy load mode and light load mode).
This enables the efficient utilization of the inverter according to your application.
• According to your application, select one of the two modes: heavy load mode and light load mode.
• The heavy load mode provides the same load rating as the conventional 3G3RX Series Inverter. This
means that the overload capacity is 150% of the rated current of the inverter for 1 minute.
• For loads (such as fan and pumps) that do not require frequent use of the inverter above the rated
torque, you can select the light load mode.
Setting the light load mode causes the rated current of the inverter to increase, which enables the
inverter to drive a motor, one size larger in capacity. However, the overload capacity is 120% of the
rated current of the inverter for 1 minute.
• Use the Heavy Load/Light Load Selection (b049) to switch between the heavy load mode and the
light load mode.
It is not necessary to cycle the power supply after changing this setting.
Parameter No.
b049
The characteristics in the heavy load mode and the light load mode are as shown below.
Item
Feature
Application
Rated current
(Example)
Overload current
rating
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 must 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.
5 - 12
Function name
00: Heavy load mode (CT)
Heavy Load/Light Load
Selection
01: Light load mode (VT)
Heavy load (CT)
Loads that require a high torque during
acceleration/deceleration etc.
Elevator, crane, conveyor, etc.
3.0 A (3-phase 200-V, 0.4-kW inverter)
150%, 60 s
High-function General-purpose Inverter 3G3RX-V1 User's Manual (I578-E1)
Data Default data
00
Light load (VT)
Loads that do not require frequent use of the
inverter above rated torque
Fan, pump, air conditioner, etc.
3.7 A (3-phase 200-V, 0.4-kW inverter)
120%, 60 s
Unit
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