8 Operation8.8.7 Operation with SigmaWin for Σ-V-SD (MT)8-40If the HWBB function is requested by turning OFF the /HWBB1 and /HWBB2 input signals on the two chan-nels, the power supply to the motor will be turned OFF within 20 ms (see below).Note: The OFF status is not recognized if the total OFF time of the /HWBB1 and /HWBB2 signals is 0.5 ms or shorter.8.8.7 Operation with SigmaWin for Σ-V-SD (MT)The HWBB function works while the SERVOPACK operates with SigmaWin for Σ-V-SD (MT).If any of the following utility functions is being used with the /HWBB1 and /HWBB2 signals turned OFF, theSERVOPACK cannot be operated by turning ON the /HWBB1 and /HWBB2 signals. Cancel the utility func-tion first, and then set the SERVOPACK to the utility function mode again and restart operation.• JOG operation• Origin search• Program JOG operation• Advanced autotuning• EasyFFT• Automatic offset-adjustment of motor current detection signal8.8.8 Brake Signal (/BK1, /BK2)When the /HWBB1 or /HWBB2 signal is OFF and the HWBB function operates, the brake signal (/BK1, /BK2) will turn OFF. At that time, Pn506 (brake reference - servo OFF delay time) will be disabled. Therefore,the motor may be moved by external force until the actual brake becomes effective after the brake signal (/BK1, /BK2) turns OFF.8.8.9 Dynamic BrakeIf the dynamic brake is enabled in Pn001.0 (stopping method after SV_OFF command), the motor will cometo a stop under the control of the dynamic brake when the HWBB function works while the /HWBB1 or /HWBB2 signal is OFF./HWBB1/HWBB2Normal operationSERVOPACKState HWBB stateON(normal operation)OFF (motor currentshut-off request)Within 20 msCAUTION• The brake signal output is not related to the safety functions. Be sure to design the system so that the sys-tem will not be put into danger if the brake signal fails in the HWBB state. Moreover, if a motor with a brakeis used, keep in mind that the brake for the motor is used only to prevent the movable part from beingmoved by gravity or an external force and it cannot be used to brake the motor.CAUTION• Be sure to design the system so that the system will not be put into danger if the motor coasts to a stop inthe HWBB state. Usually, use a sequence in which the HWBB state occurs after the motor is stoppedusing the reference.• If the application frequently uses the HWBB function, do not use the dynamic brake to stop the motor. Oth-erwise element deterioration in the SERVOPACK may result. To prevent internal elements from deteriorat-ing, use a sequence in which the HWBB state occurs after the motor has come to a stop.
