Omron JX User Manual

4-37
4-2 Function Mode
4
Functions
If the internal DC voltage has dropped below the undervoltage level during this function, output is
shut off after an undervoltage trip to enter free-run status.
(Caution)
•When the momentary power interruption non-stop deceleration level (b052) is below the
momentary power interruption non-stop function starting voltage (b051), the Inverter performs this
function by increasing b052 to b051 without an automatic setting change.
•This function is not reset before completion. To run the Inverter after power recovery during this
function, input the RUN command after entering the STOP command when stopped.
Overvoltage Control Function During Deceleration
This function helps avoid an overvoltage trip during deceleration. Note that the actual deceleration
time may be longer than the set value. This function automatically keeps DC voltage at the set level
during deceleration. The aim of this function is the same as the overvoltage LAD stop function, de-
scribed in b130 and b131. However, these functions have different deceleration characteristics and
you can select either function according to your system
.
With this function activated, PI control works to keep the internal DC voltage constant.
•Though quicker response is expected with a larger proportional gain, control tends to be divergent
and may easily lead to a trip.
•Response also becomes quicker with a shorter integral time, but if too short, it may lead to a trip as
well.
Parameter No. Function name Data Default setting Unit
b055
Overvoltage protection
proportional gain during
deceleration
0.2 to 5.0 0.2 ⎯
b056
Overvoltage protection integral
time during deceleration
0.0 to 150.0 0.2 s
b133
Overvoltage protection function
selection during deceleration
00: Disabled
01: Enabled
00 ⎯
b134
Overvoltage protection level
setting during deceleration
200-V class: 330 to 395
400-V class: 660 to 790
380/
760
V
t
t
Internal DC
voltage
Output
frequency
Set level (B134)
Normal Overvoltage protection during deceleration

Omron JX Specifications

General

Enclosure Rating	IP20
Output Frequency	0 to 400 Hz
Protection	Overcurrent, Overvoltage, Undervoltage, Overheat, Short Circuit
Communication	RS-485
Frequency Range	0.1 to 400 Hz
Power Rating	0.4 to 15 kW
Operating Temperature	-10°C to +50°C
Storage Temperature	-20°C to +65°C
Humidity	5 to 95% RH (non-condensing)
Altitude	Up to 1000 m above sea level
Output Voltage	3-phase 200 to 240 VAC, 3-phase 380 to 480 VAC
Cooling Method	Fan cooling