4-2 Function Mode Momentary Power Interruption/Trip Retry (Restart) This function allows you to determine the operation performed when a trip occurs due to momentary power interruption, undervoltage, overcurrent, or overvoltage. Set the retry condition according to your system. 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.) 4-25 Parameter No.
Function name Data Default setting Unit b001 Retry selection 00: Outputs an alarm after a trip. 01: Restarts from 0 Hz at retry. 02: Matches the frequency at retry and starts. 03: Performs frequency pull-in start at retry and trips after deceleration stop. 00 b002 Allowable momentary power interruption time 0.3 to 25.0 Trips if the momentary power interruption is within the set time. If not, it restarts. 1.0 s b003 Retry wait time 0.3 to 100.0 Time from recovery to restart 1.0 s 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 Related functions C021 to C022, C026