Table of Contents
Advertisement
Power removal function
5-2
Notes when using the power removal function
z When the power removal function is used, be sure to conduct a risk assessment of equipment in
advance and check that the safety requirements of the safety-related parts of a control system are
satisfied.
z The design of the safety-related parts of a control system using the power removal function should be
performed by qualified personnel who are trained in the relevant safety standards and understand
the contents of this chapter.
z If the power removal function operates, the motor output shaft may rotate due to external forces
(such as gravity on a vertical axis). To hold the motor output shaft in position, install an external brake
mechanism or equivalent. The brake mechanism of the electromagnetic brake motor is used for the
purpose to hold the position. Do not use the brake mechanism of the electromagnetic brake motor for
braking the motor rotation. This may result in injury or damage to equipment.
z If the power removal function operates, the driver stops supplying the power to the motor. However,
the power supplying to the driver is not shut off, and the driver is not performed electrical insulation
either. Before performing maintenance or inspection, always turn off the driver power, and check the
CHARGE LED is turned off. Failure to do so may result in electric shock.
z If the inverter circuit is failed, the motor output shaft may rotate up to 180 degrees in an electrical
angle (3.6 degrees in a mechanical angle) even when the power removal function operates. Make sure
this movement does not cause hazardous situations. Failure to do so may result in injury or damage to
equipment.
z Connect the I/O signals related to the power removal function to an external device which conforms to
the safety standard.
z Be sure to perform the verification testing of the power removal function when starting up or
maintaining the equipment, or when replacing the driver. This may result in injury or damage to
equipment. If the power removal function is used in an incorrect state such as incorrect wiring of I/O
signals, the power removal function may not operate properly, causing hazardous situations.
40
Advertisement
Table of Contents
