FR-A701 INSTRUCTION MANUAL (Applied) - Automation Systems ...

4PARAMETERS(6) Power failure deceleration signal (Y46 signal)Operation selection at power failureand instantaneous power failure⋅ After deceleration at an instantaneous power failure, inverter can not start even if the start command is given. Inthis case, check the power failure deceleration signal (Y46 signal). (at occurrence of input phase failure protection(E.ILF), etc.)⋅ The Y46 signal is on during deceleration at an instantaneous power failure or during a stop after deceleration at aninstantaneous power failure.⋅ For the Y46 signal, set "46 (positive logic)" or "146 (negative logic)" in any of Pr. 190 to Pr. 196 (output terminalfunction selection) to assign the function.⋅⋅⋅⋅⋅CAUTIONWhen the (output frequency - Pr. 262) at undervoltage or power failure occurrence is negative, the calculation result is regardedas 0Hz. (DC injection brake operation is performed without deceleration).During a stop or trip, the power failure stop selection is not performed.Y46 signal turns on when undervoltage occurs even when the motor is not decelerating at an instantaneous power failure.For this reason, Y46 signal outputs instantly at powering off, which is not a fault.When power failure deceleration stop function is selected, undervotage protection (E.UVT), instantaneous power failureprotection (E.IPF), and input phase loss protection (E.ILF) do not function.Changing the terminal assignment using Pr. 190 to Pr. 196 (output terminal function selection) may affect the other functions. Pleasemake setting after confirming the function of each terminal.CAUTIONIf power-failure stop function is set, some loads may cause the inverter to trip and the motor to coast. The motorwill coast if enough regenerative energy is given from the motor.♦ Parameters referred to ♦Pr. 12 DC injection brake operation voltage Refer to page 185Pr. 20 Acceleration/deceleration reference frequency, Pr. 21 Acceleration/deceleration time increments Refer to page 155Pr. 57 Restart coasting time Refer to page 239Pr. 190 to Pr. 196 (output terminal function selection) Refer to page 214Pr. 872 Input phase failure protection selection Refer to page 249245