PARAMETERS
90
<Setting>
Refer to the figures in the previous page and following table, and set the parameters:
Parameter
Number Setting Description
0Frequency search made
Frequency search is made after detection of an instantaneous power failure.
162 1No frequency search
Independently of the motor coasting speed, the output voltage is gradually increased
with the frequency kept as preset.
0.75K to 1.5K 0.5 s coasting time
2.2K to 7.5K 1.0 s coas t i ng t ime011K or more 3.0 s coas t i ng t ime Generally use this setting.
0.1 to 5 s Waiting time for inverter-triggered restart after power is restored from an ins tant aneous
power failure. (Set this time between 0.1 s and 5 s according to the inertia moment (J)
and torque of the load.)
57
9999 No restart
58 0 to 60 s
163 0 to 20 s
164 0 to 100%
165 0 to 150%
Normally the motor may be run with the factory settings. These values are adjus table
to the load (inertia moment, torque).
Note: 1. When restart operation is selected, UVT and IPF among the alarm output signals are not output
at occurrence of an instantaneous power failure.
2. If the inverter capacity is more than one rank higher than the motor capacity, an overcurrent
(OCT) alarm may take place, disabling the motor from starting.
3. When Pr. 57 ≠ 9999, the inverter will not run if the CS signal remain off.
4. When Pr. 162 = "0", connection of two or more motors to one inverter will make the inverter
function improperly. (The inverter will not start properly.)
5. When Pr. 162 = "0", the DC dynamic brake is operated instantly on detection of restarting speed.
Therefore, if the inertia moment (J) of the load is small, the speed may reduce.
6. When Pr. 162 = "1", the output frequency before an instantaneous power failure is stored and
output at the time of restart. If the power of the inverter control circuit is lost, the frequency before
an instantaneous power failure cannot be stored and the inverter will start at 0Hz.
7. The SU and FU signals are not output during restart but are output after the restart cushion time
has elapsed.
CAUTION
Provide mechanical interlocks for MC1 and MC2.The inverter will be damaged if power is entered into the inverter output section. When automatic restart after instantaneous power failure has been selected, the motorand machine will start suddenly (after the reset time has elapsed) after occurrence ofan instantaneous power failure. Stay away from the motor and machine.When you have selected automatic restart after instantaneous power failure, apply thesupplied CAUTION seals in easily visible places.