Yaskawa VS-626 MC5 User Manual
Page 103
5.2
Trial Operation Procedures
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Operation Using the Digital Operator
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Press the RUN Key. The motor will start to rotate. (forward rotation)
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Press the FWD/REV Key. The motor will rotate in the reverse direction.
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Press the Stop Key. The motor will stop. (The RUN Key indicator will keep blinking until the motor
stops.)
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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.
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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.
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Checking the Operating Status
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After changing the frequency reference or the rotation direction, check that there is no oscillation or
abnormal sound from the motor.
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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.
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Connecting the Load System
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After confirming that the motor has stopped completely, connect the mechanical system.
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Be sure to tighten all the screws when securing the motor shaft to the mechanical system.
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Operation using the Digital Operator
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Use the Digital Operator in the same way as in no-load operation.
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If fault occurs during operation, make sure the STOP Key on the Digital Operator is easily accessible.
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At first, set the frequency reference to a low speed of one tenth the normal operating speed.
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Checking Operating Status
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Having checked that the operating direction is correct and that the machine is operating smoothly at
slow speed, increase the frequency reference.
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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.
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Adjusting AFR Gain
There are some guidelines to settle the motor vibrations or fluctuations when carrying a load.
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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.
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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.
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