Yaskawa VS-626 MC5 User Manual

Page 103

5.2

Trial Operation Procedures

- 9

Operation Using the Digital Operator

Press the RUN Key. The motor will start to rotate. (forward rotation)

Press the FWD/REV Key. The motor will rotate in the reverse direction.

Press the Stop Key. The motor will stop. (The RUN Key indicator will keep blinking until the motor
stops.)

The frequency reference can be changed, even during operation. When this is done, the frequency ref-
erence is changed as soon as the DATA/ENTER Key is pressed to input the set values.

If the Jog Key is pressed when the Inverter is stopped, it will rotate by the jog frequency (Factory set-
ting: 6.0 Hz) only while the Key is being pressed.

Checking the Operating Status

After changing the frequency reference or the rotation direction, check that there is no oscillation or
abnormal sound from the motor.

Check that no faults have occurred in the Inverter during operation.

5.2.7 Loaded Operation

After checking the operation with the motor in no-load status as described in 5.2.6, connect the load me-
chanical system and perform trial operation with an actual load.

Connecting the Load System

After confirming that the motor has stopped completely, connect the mechanical system.

Be sure to tighten all the screws when securing the motor shaft to the mechanical system.

Operation using the Digital Operator

Use the Digital Operator in the same way as in no-load operation.

If fault occurs during operation, make sure the STOP Key on the Digital Operator is easily accessible.

At first, set the frequency reference to a low speed of one tenth the normal operating speed.

Checking Operating Status

Having checked that the operating direction is correct and that the machine is operating smoothly at
slow speed, increase the frequency reference.

After changing the frequency reference or the rotation direction, check that there is no oscillation or
abnormal sound from the motor. Check the monitor display to ensure that the U1-03 (output current)
is not excessive.

Adjusting AFR Gain

There are some guidelines to settle the motor vibrations or fluctuations when carrying a load.

Gradually increase the AFR gain (C8--08) while checking the motor response. If the motor still fluctu-
ates or vibrates although C8--08 is set to 2.0, gradually increase the AFR time constant (C8--09) to 100
ms.

Increasing the torque compensation time constant (C4--02) may settle the motor vibrations. Changing
constants C8--08, C8--09 and C4--02 may slow the speed and torque responses.