Motor Rotates In The Wrong Direction; Motor Outputs No Torque Or Acceleration Is Slow - Omron SYSDRIVE 3G3MV User Manual

Maintenance Operations
Lengthen the acceleration time or reduce the load. Also consider increasing the
motor capacity.
H The motor only rotates in one direction.
·Reverse rotation-prohibit is selected.
If n006 for reverse rotation-prohibit selection is set to 1 (reverse run prohibited), the
Inverter will not accept reverse-rotation commands.
To use both forward and reverse rotation, set n05 to 0.

8-2-3 Motor Rotates in the Wrong Direction

·The output wiring of the motor is faulty.
When the U, V, and W terminals of the Inverter are properly connected to the U, V and
W terminals of the motor, the motor will operate in a forward direction when a forward
rotation command is executed. The forward direction depends on the manufacturer
and the motor type. Therefore, be sure to check the specifications.
Switching two wires among the U, V, and W will reverse the direction of rotation.

8-2-4 Motor Outputs No Torque or Acceleration is Slow

·The Inverter in vector control is restricted by the torque compensation limit.
If the torque compensation limit in n109 is set to a value that is too small, the motor
torque will be limited to a low value and sufficient torque will not be available.
If no torque restriction is required, set the parameter to a range from 150% (default
setting) to 200%.
·The stall prevention level during running is too low.
If the value in n093 for stall prevention level during operation is too low, the speed will
drop before torque output is turned ON.
Check to be sure that the set value is suitable.
·The stall prevention level during acceleration is too low.
If the value in n094 for stall prevention level during acceleration is too slow, the accel-
eration time will be too long.
Check to be sure that the set value is suitable.
·V/f Control Limit
Unlike vector control, the output torque of the Inverter in V/f control is low at low fre-
quencies. Consider the use of vector control if higher output torque at low frequen-
cies is required.
Chapter 8
8-21