Orientalmotor aSTEP AZ Series, Руководство пользователя, Страница: 76 / 180

Power removal function
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3 DC po
w
er input t
ype
5 Power removal function
The power removal function is a function that stops supplying the power to the motor by the hardware.
This function shuts off the drive signal of the inverter circuit that controls the motor current with two input channels
(HWTO1 input, HWTO 2 input). This brings a shutoff state of the power supplying to the motor (power removal status).
The power removal function is assumed to be used to prevent unexpected starting of the moving parts of equipment
when an operator works inside the operating range of the moving parts.
HWTO1+
Main power supply
HWTO1–
HWTO2+
HWTO2–
EDM+
EDM– Drive signal
Gate driver
Load
switch
Load
switch
Control circuit
Motor
• The power removal function of the DC power input type is not a safety function.
• Be sure to check the motor is in a standstill state before executing the power removal function. If
the power removal function is executed while the motor is operated, it may cause damage to the
motor, driver, or equipment.
5-1 Notes when using the power removal function
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 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.