Omron RX Series User Manual page 388

7 Detailed Functions
Parameter
Function name
No.
Overvoltage/
Overcurrent
b008
Restart Selection
Undervoltage
b009
Restart Count
Overvoltage/
b010 Overcurrent
Restart Count
Overvoltage/
Overcurrent
b011
Restart Standby
Time
Frequency Pull-in
b028
Restart Level
Frequency Pull-in
b029
Restart Parameter
Starting Frequency
Selection at
b030
Frequency Pull-in
Restart
Related functions
*1. Even when the Power Interruption/Undervoltage Restart Selection (b001) is set to 01 to 03 (a restart option) or
the Power Interruption/Undervoltage Trip Selection During Stop (b004) is set to 00 or 02 (a disabled option), the
inverter will trip if the actual power interruption time exceeds the Allowable Power Interruption Time. (Example 2)
*2. Even when an restart option is selected, the inverter will trip if it is in an undervoltage state continuously for 40
seconds or more.
*3. The inverter may restart at 0 Hz in any of the following cases:
• The output frequency is equal to or lower than 1/2 of the base frequency.
• The motor induction voltage decreases quickly.
• The inverter recognizes that the frequency is equal to or less than the value set in the Frequency
Matching Lower Limit Frequency (b007).
*4. If an overvoltage, overcurrent, or other trip occurs during deceleration, the motor will fall in a free-run state with
a power interruption protection (E16) error. In this case, increase the deceleration time.
*5. When the control power supply terminals Ro-To are supplied with direct current (P-N), the inverter may detect
an undervoltage during power supply shutoff and then trip. If this causes any problem with your system, set the
Power Interruption/Undervoltage Trip Selection During Stop (b004) to 00 or 02 (a disabled option).
*6. Note that selecting a restart option may cause the inverter to restart suddenly when the power supply is turned
on or an alarm is reset.
*7. Even when you selected to restart the inverter during a trip, unless the trip factor is removed, the inverter will trip
when the Restart Standby Time (b003) elapses. In this case, increase the restart standby time.
7 - 62
Data
00: Trip
01: 0-Hz restart
02: Frequency matching restart
*6
03: Trip after frequency matching deceleration stop
04: Frequency pull-in restart
00: 16 times
01: No limit
*7
1 to 3 (times)
0.3 to 100.0
0.20 x Rated current to
Heavy
2.00 x Rated current (0.4 to 55 kW)
load
0.20 x Rated current to
(CT)
1.80 x Rated current (75 to 132 kW)
Light
0.20 x Rated current to
load
1.50 x Rated current
(VT)
0.10 to 30.00
00: Frequency at shutoff
01: Max. frequency
02: Set frequency
C021 to C025, C026
High-function General-purpose Inverter 3G3RX-V1 User's Manual (I578-E1)
Default data Unit
00 –
00 –
3 time
1.0 s
Rated
A
current value
0.50 s
00 –