Omron MX2 Series User Manual

7 Other Functions
7 - 82
Multi-function Compact Inverter 3G3MX2-EV2 User’s Manual (I666-E1)
7-8-5 Overcurrent Suppression Function
This function suppresses the overcurrent caused by a steep current increase due to an impact load etc.
It causes the inverter to stop accelerating when the output current reaches approximately 180% of the rated current.
Parameter No.
Function name
Data
Default
data
Unit
b027
Overcurrent Suppression
Selection
00: Disabled
01: Enabled
02: Enabled (Reduced voltage startup)
01
−
• If setting the Overcurrent Suppression Selection (b027) to 01 (Enabled) still causes an overcurrent,
set it to 02 (Reduced voltage startup). This setting reduces the output voltage and moreover sup-
presses the overcurrent at the startup after a temporal stop.
• Even during overcurrent suppression, input from the STOP/RESET key will be accepted.
• Although the overcurrent suppression function is enabled, an overcurrent trip may occur due to short
circuit or equivalent.
Output current
180% of rat
current
Time
Time
7-8-6 External Trip (EXT)
Use this signal to have the inverter trip via an error signal generated by a peripheral system. To do so,
set the Multi-function Input 1 to 7 Selection (C001 to C007) to 12 (EXT).
When the EXT terminal turns ON, the inverter trips with the alarm code E12 displayed and shuts off its output.
Once the inverter trips with the alarm code E12 displayed, the trip status will not be reset even if the
error signal is reset from external equipment (the terminal EXT is turned OFF).
In this case, perform the reset operation or cycle the power supply to reset the trip.
Parameter No.
Function name
Data
Default
data
Unit
C001 to C007
Multi-function Input 1 to
7 Selection
12: EXT (External trip)
−
−
RUN command FW/RV
Input to terminal EXT
Motor rotation speed
RS (Reset) input
AL output
(Alarm signal)
ed
Output frequency
Free running
7
7-8 Functions Related to Protection, Warning, and Various Output Signals
7-8-5 Overcurrent Suppression Function

Omron MX2 Series Specifications

General

Cooling Method	Fan cooling
Output Frequency Range	0.1 to 400 Hz
Control Method	V/f control, Sensorless vector control
Protection Functions	Overcurrent, overvoltage, undervoltage, overload, overheating, short circuit
Communication Options	Modbus RTU
Overload Capacity	150% for 60 seconds
Braking Unit	Built-in
Ambient Operating Temperature	-10°C to +50°C
Enclosure	IP20
Storage Temperature	-20°C to +65°C
Humidity	5 to 95% RH (non-condensing)
Altitude	Up to 1000m
Power Supply Voltage	200-240V AC
Input Voltage	3-phase 200-240V AC