56
2-8-17 Overtorque Detection Function
Item name
Constant to be set
Factory preset
Overtorque detection level
No. 38
160%
Overtorque detection time
No. 39
0.1 s
Overtorque detection signal
No. 34 and No. 35
No. 34 = 0, No. 35 = 1
Overtorque detection selection
No. 37
0000
When an excessive load is placed on the machine, the increase in
motor current is detected and alarm signal can be output.
If the current exceeds the value set in No. 38 for longer than the
time limit set in No. 39, the overtorque detection signal is output to
control circuit terminal 13 or 14 until the current falls below the
value set in No. 38.
To output the signal to control circuit terminal 13, set constant No.
34 to 4. To output the signal to control circuit terminal 14, set con-
stant No. 35 to 4.
Time
Overtorque
detection signal
Motor current
No. 39
ON
ON
No. 39
No. 38
The second digit of No. 37 determines whether overtorque will be
detected during acceleration and deceleration, and the third digit
determines whether overtorque will be treated as a fault (OL3) or
operation will continue after overtorque is detected.
2
nd
digit
0: Detection only at steady speed
1: Detection during accel/decel also
No. 37 = x001
1
st
digit
0: Overtorque detection disabled
1: Overtorque detection enabled
3
rd
digit
0: Operation after overtorque detection
1: Output shut off after overtorque detection
Description of Functions and Constants
Section 2-8
