Delta MH300 Series - Page 669

Chapter 13 Warning Codes|MH300
13-20
ID No. Display 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 Over-torque Detection Selection (Motor 2) =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 the output current < Pr.06-10, the Ot2 warning automatically clears
Reset condition When the output current < Pr.06-10, 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.
A
ccel./ 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), e
specially 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.
Overload 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-
71 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.