YASKAWA SERVOPACK Sigma 7W Series Product Manual

Contents

5.1 Introduction to the HWBB Function5.1.1 What Is the HWBB Function?5-25.1 Introduction to the HWBB Function5.1.1 What Is the HWBB Function?An HWBB function is built into the SERVOPACK to reduce the risks associated with using themachine by protecting workers from the hazards of moving machine parts and otherwiseincreasing the safety of machine operation. When working in hazardous areas inside guards isnecessary, such as for machine maintenance, the HWBB function can be used to avoid haz-ardous moving machine parts.Refer to the following section for information on the HWBB function and safety parameters.Compliance with UL Standards, EU Directives, and Other Safety Standards on page xxviii5.1.2 Precautions for the HWBB FunctionProducts that display the TÜV mark on the nameplate have met the safety standards.ImportantWARNING To confirm that the HWBB function satisfies the safety requirements of the system, youmust conduct a risk assessment of the system.Incorrect use of the safety function may cause injury. The Servomotor will move if there is an external force (e.g., gravity on a vertical axis) evenwhen the HWBB function is operating. Use a separate means, such as a mechanical brake,that satisfies the safety requirements.Incorrect use of the safety function 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 an application onlyafter confirming that movement of the motor will not result in a hazardous condition.Incorrect use of the safety function may cause injury. The dynamic brake and the brake signal are not safety-related elements. You must designthe system so that SERVOPACK failures will not cause a hazardous condition while theHWBB function is operating.Incorrect use of the safety function may cause injury. Connect devices that satisfy the safety standards for the signals for an HWBB function.Incorrect use of the safety function may cause injury. The HWBB function does not shut OFF the power to the SERVOPACK or electrically isolateit. Implement measures to shut OFF the power supply to the SERVOPACK before you per-form maintenance on it.There is a risk of electric shock.