Switching External operation, PU oper...
Setting Pr.79 (Operation mode) to "6" sets the switchover mode. Pressing the "PU/EXT" key on the operation panel during External operation switches the mode ... More Details >>
Inverter drive of 400 V class motor
When the wiring between the inverter and motor is long, surge voltage occurs at the terminal of the motor.This surge voltage deteriorates insulation of the m... More Details >>
Parameter copy method of FR-Configurator
The data can be copied to other inverters. 1. Save the parameter of the inverter to be copied with extension "pr3" by using "export". 2. Replace the connecte... More Details >>
1. Stall prevention operation works when the inverter's output current exceeds the value set with Pr.22.In this case, it is considered that the current did n... More Details >>
"OL" stands for "overload". Whenever current of 150% or more of the inverter rated current flows, "OL" is ON. If you continue operation with "OL" is displaye... More Details >>
What happens if reset occurs during o...
This is because when the inverter restarts while the motor is coasting, an overcurrent trip can occur during the restart process. However, the recent types o... More Details >>
MR-J4(W)-B mode selection application
From Start menu of Windows >, click [All Programs] > - [MELSOFT Application] > - [MR Configurator2] > and you can find “MR-J4(W)-B mode selectio... More Details >>
Operation mode, PU operation mode swi...
Change Pr.340 (Communication startup mode selection) from "1" to "0".Power OFF and then ON the inverter.Operate the inverter according to the value of Pr.79 ... More Details >>
Cause of overcurrent (OC2) at constan...
First of all, capacity reduction of the main circuit electrolytic capacitor is probable. Usually, the electrolytic capacitor is replaced every 5 years on ave... More Details >>
When the wire between the 400 V inverter and motor is long (20 m or longer), surge voltage occurs momentarily. This voltage is as two or more times as the DC... More Details >>
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