Omron RX Series User Manual page 415

Parameter
No.
Deceleration Time on
b053
Power Interruption
Deceleration Starting Width
b054
on Power Interruption
Proportional Gain on Power
b055
Interruption
Integral Time on Power
b056
Interruption
Deceleration Stop on Power Interruption: b050 = 01 (Deceleration Stop)
• If a power supply shutoff or undervoltage is detected during operation, the function causes the
inverter to stop after deceleration so that the internal DC power of the inverter does not exceed the
Deceleration Hold Level on Power Interruption (b052).
• To use this function, remove the J51 connector cable connected between the terminals Ro and To
and connect the main circuit terminals P and N to Ro and To via cables, respectively.
The cable size should be 0.75 mm
• If, after a power supply shutoff is detected during operation, the internal DC power of the inverter falls
to or below the Starting Voltage on Power Interruption (b051), the inverter will decrease the frequency
to the value set in the Deceleration Starting Width on Power Interruption (b054)
and then cause the motor to decelerate according to the Deceleration Time on Power Interruption
(b053).
• The motor will stop decelerating if, due to the regenerative energy produced during deceleration, the
internal DC power of the inverter rises to or above the Deceleration Hold Level on Power Interruption
(b052) and start decelerating again if it falls to or below the value set in b052.
Precautions for Correct Use Precautions for Correct Use
• Be sure to set the Deceleration Hold Level on Power Interruption (b052) to a value higher than
the input power supply voltage multiplied by the square root of 2. Normally, do not set this
value to 350 V or less for 200-V class and 700 V or less for 400-V class. If it is set to a value
less than the input power supply voltage multiplied by the square root of 2, the motor will
remain in a deceleration stop state even after the power is restored and cannot decelerate.
(Neither the RUN command and the frequency reference do not accept input until the
operation completes after a deceleration stop.)
• 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 run according to the b051 setting.
• This function will not reset until the motor decelerates and stops running. To restart the
inverter after power recovery with this function activated, after the motor stops, turn ON the
RUN command input again.
• If the value set in the Deceleration Starting Width on Power Interruption (b054) is too large, the
motor may decelerate rapidly, causing an overcurrent. If an overcurrent occurs, decrease the
b054 value.
• If the Deceleration Starting Width on Power Interruption (b054) is too small or if the
Deceleration Time on Power Interruption (b053) is too long, there will be a shortage of the
regenerative energy, causing the internal DC power voltage of inverter to drop, which in turn
causes an undervoltage. Should an undervoltage occur, increase the b054 value or decrease
the b053 value.
High-function General-purpose Inverter 3G3RX-V1 User's Manual (I578-E1)
Function name
0.01 to 99.99
100.0 to 999.9
1000. to 3600.
0.00 to 10.00
0.00 to 2.55:
Proportional gain for DC voltage constant
control (b050 = 02, 03 only)
0.000 to 9.999/10.00 to 65.53: Integral time
when DC voltage is kept constant (b050 =
02, 03 only)
2
or larger.
7 Detailed Functions
Data Default data
1.00
0.00
0.20
0.100
Unit
s
Hz
–
s
7
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