6 precautions for safety functions, Warning – Yaskawa Sigma-5 User Manual: Design and Maintenance - Linear Motors MECHATROLINK-III Communications Reference User Manual

Page 150

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4 Operation

4.9.6 Precautions for Safety Functions

4-62

4.9.6 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 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 motor 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 motor will not result in a dangerous condition.
Incorrect use of the machine may cause injury.

• The dynamic brake and the brake signal are not safety-related parts of a control system. 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.

• Connect devices meeting safety standards for the signals for safety functions.

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 servomotor with

independent electric or mechanical parts.
Incorrect use of the machine may cause injury.

• The HWBB function does not shut off the power to the SERVOPACK or electrically isolate it. Take mea-

sures to shut off the power to the SERVOPACK when performing maintenance on it.
Failure to observe this warning may cause an electric shock.

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