Omron SYSDRIVE MX2 SERIES, User Manual

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5 Basic Settings
5 - 12 Multi-function Compact Inverter 3G3MX2-V1 User’s Manual (I585-E1)
Precautions for Correct Use
Even if the Free V/f Frequency 1 to 7 are set to 800 V, the inverter cannot produce output voltage
higher than the input voltage or the value of the 1st/2nd Motor Rated Voltage Selection
(A082/A282).
Be sure to check that the output characteristic setting is proper. An improper setting causes over-
current during acceleration or deceleration, or vibration of the motor and/or machine.
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 previous inverters, which 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. 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.
The inverter features of the heavy load mode and the light load mode are as shown below.
5-2-2 Heavy Load/Light Load Selection
Parameter No. Function name Data Default data Unit
b049
Heavy Load/Light Load
Selection
00: Heavy load mode (CT)
00
−
01: Light load mode (VT)
Item Heavy load (CT) Light load (VT)
Feature
Loads that require a high torque during
acceleration/deceleration etc. Loads that do not require frequent use of
the inverter above rated torque
Application example Elevator, crane, conveyor, etc. Fan pump, air conditioner, etc.
Rated output current
(Example)
3.0 A (3-phase 200-V, 0.4-kW inverter) 3.5 A (3-phase 200-V, 0.4-kW inverter)
Overload current rating 150%, 60 s 120%, 60 s
V7
V6
0 f6 f7
Output frequency
[Hz]
Output voltage
[V]
The output voltage will be lim-
ited to the applicable output
voltage even if exceeded.