Omron SYSDRIVE MX2 SERIES, User Manual

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7 Other Functions
7 - 68 Multi-function Compact Inverter 3G3MX2-V1 User’s Manual (I585-E1)
Use this function to have the inverter decelerate and stop after the power supply is shut off during oper-
ation, while preventing it from exceeding the overvoltage level.
You can select one of the three deceleration stop methods provided in the Deceleration Stop Selection
on Power Interruption (b050).
This function will not be canceled until the inverter completes deceleration stop operation. To restart the
inverter after power recovery with this function activated, turn ON the STOP command (to turn OFF the
RUN command) and then turn ON the RUN command again.
7-7-4 Deceleration Stop on Power Interruption Function
Parameter
No.
Function name Data
Default
data
Unit
b050
Deceleration Stop Selec-
tion on Power Interrup-
tion
00: Disabled
00
−
01: Enabled (Deceleration stop)
02: Enabled (Constant voltage, without recovery)
*1
*1. When b050 is set to 02 or 03, PI control works to keep the internal DC voltage constant.
Adjust the Overvoltage Suppression Proportional Gain During Deceleration (b133)/Overvoltage Suppression
Integral Time During Deceleration (b134) value:
To improve the responsiveness, increase the proportional gain value and decrease the integral time value.
However, doing so increases the possibility of a trip.
Conversely, decreasing the proportional gain value and increasing the integral time value excessively results
in an undervoltage.
03: Enabled (Constant voltage, with recovery)
b051
Starting Voltage on
Power Interruption
*2
*2. The values set in b051 and b052 must be the undervoltage level (210 V for 200-V class, 410 V for 400-V class)
or higher.
This function will not work if the inverter causes an undervoltage trip.
Note also that the b051 value must be lower than the b052 value.
0.0 to 1000.
The function will be activated if the DV voltage drops
to the set value or lower.
220.0/
440.0
V
b052
Deceleration Hold Level
on Power
Interruption
*2*3
*3. When the Deceleration Stop Selection on Power Interruption (b050) is set to 01 (Enabled: Deceleration stop),
be sure to set the Deceleration Hold Level on Power Interruption (b052) to a value higher than the incoming
voltage multiplied by the square root of 2. Set b052 to 380 VDC or higher for 240-VAC incoming voltage and
to 750 VDC or higher for 480 VAC-incoming voltage, respectively. If it is set to a value less than the incoming
voltage multiplied by the square root of 2, the inverter will remain in a deceleration stop state even after the
power is restored and cannot decelerate. (The inverter accepts neither RUN command nor frequency refer-
ence input until the deceleration stop operation is completed.) In this case, turn OFF the inverter power supply
to complete the operation of the deceleration stop function.
If the value set in the Deceleration Hold Level on Power Interruption (b052) is less than the value set in the
Starting Voltage on Power Interruption (b051), the inverter will ignore the b052 setting and operate according
to the b051 setting.
0.0 to 1000.
The inverter will stop decelerating if the voltage rise
caused by regeneration exceeds the set value after
starting operation.
360.0/
720.0
V
b053
Deceleration Time on
Power Interruption
*4
0.01 to 3600.
Set the deceleration time for the deceleration stop on
power interruption function.
1.00 s
b054
Deceleration Starting
Width on Power
Interruption
*4
0.00 to 10.00
Set when you want to have the inverter start deceler-
ating as the difference from the output frequency.
0.00 Hz
b133
Overvoltage Suppression
Proportional Gain During
Deceleration
0.00 to 5.00 0.20
−
b134
Overvoltage Suppression
Integral Time During
Deceleration
0.0 to 150.0 1.0 s
Related functions b001