Operating Instructions

Warning Codes
Digital Keypad RT-KEYPAD
273 | 443
ID No.
Display on LCD Keypad
Warning Name
Description
20
Over-torque 1
(ot1)
Over-torque 1 warning
Action and Reset
Action level
Pr.06-07
Action time
Pr.06-08
Warning setting parameter
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
Reset method
When the output current < Pr.06-07, the Ot1 warning automatically clears
Reset condition
When the output current < Pr.06-07, the Ot1 warning automatically clears
Record
N/A
Cause
Corrective Actions
Incorrect parameter setting
Configure the settings for Pr.06-07 and Pr.06-08 again.
Mechanical error (e.g. mechanical lock
due to over-torque)
Remove the malfunction causes.
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 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).
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.07-26 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 the speed tracking function.
Adjust the maximum current for Pr.07-09 speed tracking.
ID No.
Display on LCD 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