Table of Contents
Advertisement
(2)
Setting of stall prevention operation level (Pr. 22)
Pr. 22
Constant
speed
OL
Stall prevention operation example
NOTE
If an overload status lasts long, an inverter trip (e.g. electronic thermal O/L relay (E.THM)) may occur.
(3)
Stall prevention operation signal output and output timing adjustment (OL signal, Pr. 157)
When the output current exceeds the stall prevention operation level and stall prevention is activated, the stall prevention
operation signal (OL signal) turns ON for longer than 100ms. When the output current falls to or below the stall prevention
operation level, the output signal turns OFF.
Use Pr. 157 OL signal output timer to set whether the OL signal is output immediately or after a preset period of time.
This operation is also performed when the regeneration avoidance function or
For the OL signal, set "3 (positive logic) or 103 (negative logic)" in Pr. 190 or Pr. 192 (output terminal function selection) and
assign the function to the output terminal.
Pr. 157 Setting
0
Output immediately.
(initial value)
0.1 to 25
Output after the set time (s) has elapsed.
9999
Not output.
NOTE
If the frequency has fallen to 1Hz by stall prevention operation and remains for 3s, a fault (E.OLT) appears to trip the
inverter output.
Changing the terminal assignment using Pr. 190 and Pr. 192 (output terminal function selection) may affect the other
functions. Set parameters after confirming the function of each terminal.
Adjustment of the output torque (current) of the motor
Output current
Output frequency
Time
Description
For Pr. 22, set the output current level where the stall
prevention is activated. Set the output current level in ratio to
the rated inverter current (rated IPM motor current under IPM
motor control). Normally set 120% (initial value).
Stall prevention operation stops acceleration (makes
deceleration) during acceleration, makes deceleration during
constant speed, and stops deceleration (makes acceleration)
during deceleration.
When stall prevention operation is performed, the OL signal is
output.
(overvoltage stall) is executed.
Overload state (OL operation)
OL output signal
Pr. 157 set time(s)
97
4
Advertisement
Table of Contents
