Delta MS300 Series User Manual page 497

Chapter 13 Warning CodesMS300
ID No. Display on LCD Keypad
20
Action Condition
Action Time
Warning Setting Parameter
Reset Method
Reset Condition
Record
Cause
Incorrect parameter setting
Mechanical error (e.g. mechanical
lock due to over-torque)
The load is too large
Accel. / Decel. time and working
cycle is too short
V/F voltage is too high
The motor capacity is too small
Overload during low-speed
operation
The torque compensation is too
large
Improper parameter settings for
the speed tracking function
(including restart after momentary
power loss and restart after fault)
Warning Name
Over-torque 1
(ot1)
Action and Reset
Pr.06-07
Pr.06-08
Pr.06-06 Over-torque Detection Selection (Motor 1) = 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
When the output current < Pr.06-07, the Ot1 warning automatically clears
When the output current < Pr.06-07, the Ot1 warning automatically clears
N/A
Configure the settings for Pr.06-07 and Pr.06-08 again.
Remove the causes of malfunction.
Decrease the loading.
Replace with a motor with larger capacity.
Increase the setting values for Pr.01-12–01-19 (accel./ decel. time)
Adjust the V/F curve (Motor 1, Pr.01-01–01-08), 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).
Replace with a motor with larger capacity.
Decrease the loading during low-speed operation.
Increase the motor capacity.
Adjust the torque compensation value (Pr.07-26 torque compensation gain)
until the output current decreases and the motor does not stall.
Correct the parameter settings for speed tracking.
Start the speed tracking function.
Adjust the maximum current for Pr.07-09 speed tracking.
488
Description
Over-torque 1 warning
Corrective Actions