Omron RX2 Series User Manual page 473

Precautions for Correct Use
• When selecting a retry function, see 8-2 Tripless Functions on page 8-40.
• When the control circuit power supply is turn off and the power is lost, the operation mode will
be the same as the mode at power-on. For subsequent operations, see the explanation
about the restart after reset.
• When direct current (P-N) is supplied to control power supply terminal R0 and T0, the
inverter may detect under-voltage at power interruption and then trip. If there is any problem
with your system, set [bb-27] to 00 or 02.
• Even if Selection of instantaneous power failure trip [bb-20] is set to other than 0 and Selec-
tion of instantaneous power failure/under-voltage trip during stopping [bb-27] is set to "Dis-
abled" (00 or 02), [E016] Instantaneous power failure error will occur when the actual power
failure time exceeds the allowable instantaneous power failure time.
• Even during a retry operation, the retry will be interrupted if the instantaneous power fail-
ure/under-voltage condition continues for about 40 seconds, and error code [E009]
Under-voltage or [E016] Instantaneous power failure will be displayed.
• When connecting separate power supplies to control power supply terminals (R0 and T0),
and if an instantaneous power failure occurs at the main power supply terminals (R, S, and
T), it will take about 1 second of the detection time before an instantaneous power failure
error and under-voltage error occur. When braking is performed by [AL] alarm signal (output
terminal function 017), the braking response will be slow, and therefore use the brake control
function.
 Parameter
Item
The number of retries
after instantaneous
power failure
The number of retries
after under voltage
Selection of restart
mode @Instanta-
neous power failure/
under-voltage trip
Allowable under-volt-
age power failure time
Retry wait time before
motor restart
Instantaneous power
failure/under-voltage
trip alarm enable
High-function General-purpose Inverter RX2 Series User's Manual
Parameter Data
[bb-20] 0 to 16 / 255
[bb-21] 0 to 16 / 255
00
01
[bb-24]
02
04
[bb-25] 0.3 to 25.0 (s)
[bb-26] 0.3 to 100.0 (s) Sets the time before restarting.
00
01
[bb-27]
02
Description
Detects a decrease in the control power
supply and restarts the motor when the
power supply is recovered. When 0 is speci-
fied, the inverter immediately trips when an
instantaneous power failure occurs.
Detects a decrease in the main power sup-
ply and restarts the motor when the power
supply is recovered. When 0 is specified, the
inverter immediately trips when an
under-voltage condition occurs.
Restarts with 0 Hz at retry.
Restarts with speed matching at retry.
Restarts with frequency pull-in at retry.
Restarts with speed matching at retry, and
trips after deceleration stop.
Restarts if the instantaneous power failure is
within the set time.Trips if the instantaneous
power failure exceeds the specified time.
Disabled
Enabled
Disabled during stopping and during decel-
eration stop after the operation command
has been turned off.
8 Applied Settings
Default
data
0
0
01
1.0
0.3
00
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