Motor Does Not Operate When Run Command Is Input; Motor Stops During Acceleration Or When Load Is Connected; Motor Rotation Direction Cannot Be Changed; Motor Rotates In Wrong Direction - Omron SYSDRIVE 3G3HV SERIES User Manual

Operation
D Motor Does Not Operate when Run Command is Input
• The operation mode is improper.
The motor will not operate when the run command is input to the Inverter if n002 is set to 0 or 2 or the
Inverter is operated with the Digital Operator. Set n002 to 1 or 3 or press the Operation Mode Selection
Key to enable the Inverter to operate with control input.
• The Inverter is in 3-wire sequential operation.
Even if the Inverter is ready to accept remote run input, the motor will not operate when the forward/
stop or reverse/stop rotation command is input to the Inverter in 3-wire sequential operation because
the meanings of the run signals input to the Inverter in 2-wire sequential operation are different from
the meanings of the run signals input to the Inverter in 3-wire sequential operation.
Set with n035 multi-function input selection 1 to 0 when the Inverter is in 2-wire sequential operation.
• Any of the bottom two lines of the monitor item indicators is lit.
The Inverter does not start while any indicator on the bottom two lines is lit.
To start the Inverter, press the Mode Key to light an indicator on the top two lines and input the run
command.
• The reference frequency is too low.
When the reference frequency is less than the minimum output frequency set with n017, the Inverter
cannot operate. Change the reference frequency to the minimum output frequency or more.
• The emergency stop signal is input to the Inverter.
The motor does not operate if the emergency stop signal is input to the Inverter.
Turn OFF the emergency stop signal and input the run command.
D Motor Stops During Acceleration or When Load is Connected
The load is excessive.
The Inverter has a stall preventive function and full automatic torque boost function. If the acceleration
of the motor is too high or the load excessive, however, the motor response limit will be exceeded.
To prevent this, increase the acceleration time, reduce the load, or increase the motor capacity.
D Motor Accelerated and Rotating Stalls to Stop When Motor Rotation Speed
Reaches a Certain Level
The energy-saving control settings of the Inverter are improper.
The output voltage is too small because the lower output voltage limits set with n097 and n098 are too
small.
Set the lower output voltage limits at 60 Hz and 6 Hz with n097 and n098 to larger values so that the
motor will not stall to a stop.
D Motor Rotation Direction Cannot Be Changed
The reverse rotation of the motor is inhibited.
The Inverter will not accept the reverse rotation command in n006 because reverse rotation inhibit
selection is set to 1. Set n006 to 0.
H Motor Rotates in Wrong Direction
The motor output line is connected incorrectly.
If terminals T1 (U), T2 (V), and T3 (W) of the Inverter are correctly connected to terminals T1 (U), T2 (V),
and T3 (W) of the motor, the motor rotates in the forward direction when the forward rotation command
is input. Since the forward direction of rotation depends on the motor manufacturer and model, check
the motor specifications.
To reverse the direction of rotation, switch the wires of two phases of T1 (U), T2 (V), and T3 (W) or set
n005 for motor rotation direction selection to 1.
Chapter 4
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