Omron SYSDRIVE MX SERIES User Manual page 129

Overvoltage LAD Stop Function
•This function helps avoid an overvoltage trip of the Inverter due to regenerative energy from the
motor during deceleration.
Parameter No. Function name
Overvoltage LAD stop
b130
function
Overvoltage LAD stop
b131
function level setting
•Select to enable or disable the overvoltage LAD stop function in b130.
•Adjust the overvoltage LAD stop function level in b131.
•The main circuit DC voltage rises because of regenerative energy from the motor once
deceleration starts. With the overvoltage LAD stop function enabled (b130 = 1), the Inverter stops
deceleration temporarily once the main circuit DC voltage has reached the overvoltage LAD stop
level, which is lower than the overvoltage level. Deceleration then resumes if the voltage level falls
below the overvoltage LAD stop level.
•With the overvoltage LAD stop function enabled (b130: 01), the actual deceleration time becomes
longer than the set value (F003/F203).
•This function does not aim to keep the main circuit DC voltage level constant. Therefore, an
overvoltage trip may occur if the main circuit DC voltage rises rapidly because of rapid
deceleration.
Main circuit DC
voltage
Overvoltage level
Overvoltage LAD
stop function level
Output frequency
Data
00: Disabled
01: Enabled
200-V class: 330 to 395
400-V class: 660 to 790
(Inverter DC voltage)
Deceleration
suspended
Deceleration started
Deceleration restarted
4-2 Function Mode
Default setting
00
200-V class: 380 V
400-V class: 760 V
Time
Deceleration suspended
Time
Unit

V
4
4-38