4-2 Function Mode 4 Functions „ Trip Retry Function •Select the retry function during operation in [b001] (01 or 02). If [b005] is 00 (default), the following operations are to be performed. At the time of momentary power interruption and undervoltage: Restarts 16 times and trips on the 17th time. At the time of overcurrent and overvoltage: Restarts 3 times respectively and trips on the 4th time. Retry times are counted separately for momentary power interruption, undervoltage, overcurrent, and overvoltage. For example, an overvoltage trip occurs only after 3-time overcurrent trips and then 4-time overvoltage trips.
For momentary power interruption and undervoltage, if [b005] is set to 01, the retry operation continues until the status is cleared. •You can select the operation for momentary power interruption and undervoltage during stop in b004. (Supplemental Information) Frequency matching start: Restarts the motor without stopping it after matching the motor rotation speed. (If the RUN command is set on the Digital Operator (A002 = 2), the Inverter stops.) •Below is the timing chart where the retry function (b001: 02) is selected.
(Example 1) Duration of momentary power interruption interruption (b002) (Example 2) Duration of momentary power interruption > Allowable duration of momentary power interruption (b002) Power supply Power supply Inverter output Inverter output Free running Motor rotation speed t1 Motor rotation speed Alarm ON Alarm ON [t0: Duration of momentary power interruption / t1: Allowable duration of momentary power interruption (b002) / t2: Retry wait time (b003)] OFF OFF 4-28 Parameter No. Function name Data Default setting Unit b004 Momentary power interruption/ undervoltage trip during stop selection 00: Disabled 01: Enabled 00 ⎯ b005 Momentary power interruption retry time selection 00:
16 times 01: No limit 00 ⎯ b011 Starting frequency at frequency pull-in restart 00: Frequency at interruption 01: Max. frequency 02: Set frequency 00 ⎯ b029 Deceleration rate constant at frequency pull-in restart 0.1 to 3000.0 0.5 s b030 Frequency pull-in restart level 0.2 × Rated current to 2.0 × Rated current Rated current A Related functions C021, C026 Fre t0 t2 t0 t1