YASKAWA SGD7S Product Manual page 18

 When you adjust the gain during system commissioning, use a measuring instrument to monitor
the torque waveform and speed waveform and confirm that there is no vibration.
If a high gain causes vibration, the Servomotor will be damaged quickly.
 Do not frequently turn the power supply ON and OFF. After you have started actual operation,
allow at least one hour between turning the power supply ON and OFF (as a guideline).
Do not use the product in applications that require the power supply to be turned ON and OFF
frequently.
The elements in the SERVOPACK will deteriorate quickly.
 An alarm or warning may occur if communications are performed with the host controller while
the SigmaWin+ or Digital Operator is operating.
If an alarm or warning occurs, it may interrupt the current process and stop the system.
 After you complete trial operation of the machine and facilities, use the SigmaWin+ to back up
the settings of the SERVOPACK parameters. You can use them to reset the parameters after
SERVOPACK replacement.
If you do not copy backed up parameter settings, normal operation may not be possible after a
faulty SERVOPACK is replaced, possibly resulting in machine or equipment damage.
 Maintenance and Inspection Precautions
 Do not change any wiring while power is being supplied.
There is a risk of electric shock or injury.
 Wiring and inspections must be performed only by qualified engineers.
There is a risk of electric shock or product failure.
 Wait for at least six minutes after turning OFF the power supply (with a SERVOPACK for a 100-
VAC input, wait for at least nine minutes) and then make sure that the CHARGE indicator is not
lit before starting wiring or inspection work. Do not touch the power supply terminals while the
CHARGE lamp is lit after turning OFF the power supply because high voltage may still remain in
the SERVOPACK.
There is a risk of electric shock.
 Before you replace a SERVOPACK, back up the settings of the SERVOPACK parameters. Copy
the backed up parameter settings to the new SERVOPACK and confirm that they were copied
correctly.
If you do not copy backed up parameter settings or if the copy operation is not completed normally,
normal operation may not be possible, possibly resulting in machine or equipment damage.
 Discharge all static electricity from your body before you operate any of the buttons or switches
inside the front cover of the SERVOPACK.
There is a risk of equipment damage.
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CAUTION
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