Mitsubishi Electric FR-D720-0.2K-G Instruction Manual page 87

Adjustment of the output torque (current) of the motor
(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 (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 functions 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 speed has fallen to 15r/min by stall prevention operation and remains for 3s, a fault (E.OLT) appears to shutoff
the drive unit output.
 Changing the terminal assignment using Pr. 190 or Pr. 192 (output terminal function selection) may affect the other
functions. Set parameters after confirming the function of each terminal.
(4) Set two types of stall prevention operation levels (Pr. 48)
Turning RT signal ON makes Pr. 48 Second stall prevention operation current valid.
For the terminal used for RT signal input, set "3" in any of Pr. 178 to Pr. 182 (input terminal function selection) to assign the
function.
NOTE
 Changing the terminal assignment using Pr. 178 to Pr. 182 (input terminal function selection) may affect the other
functions. Set parameters after confirming the function of each terminal.
 The RT signal acts as the second function selection signal and makes the other second functions valid.
(Refer to page 120.)
84
Description
(overvoltage stall) is executed.
Overload state (OL operation)
OL output signal
Pr. 157 set time(s)