Chapter 13 Warning CodesC2000
13-12
ID No. Display on LCM Keypad Warning Name Description
21
Over-torque
(ot2)
Over-torque 2 warning
Action and Reset
Action level Pr. 06-10
Action time Pr. 06-11
Warning setting parameter
Pr. 06-09=1 or 3
0: No function
1: Continue operation after over-torque detection during constant speed
operation
2: Stop after over-torque detection during constant speed operation
3: Continue operation after over-torque detection during RUN
4: Stop after over-torque detection during RUN
Reset method When output current < (Pr. 06-10 – 5%), the Ot2 warning automatically clears
Reset condition When output current < (Pr. 06-10 – 5%), the Ot2 warning automatically clears
Record N/A
Cause Corrective Actions
Incorrect parameter setting Configure the settings for Pr. 06-10 and Pr. 06-11
Mechanical error (e.g. mechanical
lock due to over-torque)
Remove the causes of malfunction.
The load is too large
Decrease the loading.
Replace with a motor with larger capacity.
Accel./ Decel. time and working
cycle is too short
Increase the setting values for Pr. 01-12–01-19 (accel./ decel. time)
V/F voltage is too high
Adjust the V/F curve (Motor 2, Pr. 01-35–01-42), especially the setting value for
the mid-point voltage (if the mid-point voltage is set too small, the load capacity
decreases at low-speed).
The motor capacity is too small Replace with a motor with larger capacity.
Over-load during low-speed
operation
Decrease the loading during low-speed operation.
Increase the motor capacity.
The torque compensation is too
large
Adjust the torque compensation value (Pr. 07-26 torque compensation gain)
until the output current decreases and the motor does not stall.
Improper parameter settings for
the speed tracking function
(including restart after momentary
power loss and restart after fault)
Correct the parameter settings for speed tracking.
Start speed tracking function.
Adjust the maximum current for Pr. 07-09 speed tracking.
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