4.7 Safety Function
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4
Operation
4.7.6
Precautions for Safety Functions
WARNING
• To check that the HWBB function satisfies the safety requirements of the system, be sure to conduct a risk
assessment of the system.
Incorrect use of the machine may cause injury.
• The linear servomotor moves if there is external force (e.g., gravity in a vertical axis) when the HWBB
function is operating. Therefore, use an appropriate device independently, such as a mechanical brake,
that satisfies safety requirements.
Incorrect use of the machine may cause injury.
• While the HWBB function is operating, the linear servomotor may move within an electric angle of 180
°
or
less as a result of a SERVOPACK failure. Use the HWBB function for applications only after checking that
the movement of the linear servomotor will not result in a dangerous condition.
Incorrect use of the machine may cause injury.
• The dynamic brake and the brake signal are not related to safety functions. Be sure to design the system
that these failures will not cause a dangerous condition when the HWBB function operates.
Incorrect use of the machine may cause injury.
• The SERVOPACK with its signals for a safety function must be connected to a device that meets safety
standards.
Incorrect use of the machine may cause injury.
• If the HWBB function is used for an emergency stop, turn OFF the power supply to the linear servomotor
with independent electric or mechanical parts.
Incorrect use of the machine may cause injury.
• The HWBB function does not turn OFF the power supply to the SERVOPACK or electrically isolate the
SERVOPACK. When maintaining the SERVOPACK, be sure to turn OFF the power supply to the SERVO-
PACK independently.
Failure to observe this warning may cause an electric shock.
